I see a lot of people talking about how either Sorin or Nahiri or both were acting like total ********s in their initial confrontation. Personally, I can sympathize with both of them, though I'm inclined to side with Sorin more.
On the one hand, Sorin had a perfectly valid reason for not answering Nahiri's call. He didn't receive her transmission because Avacyn's planar shield had blocked it from reaching Innistrad. Unlike Nahiri, I really can't fault him for that. He had no way of knowing that would happen, and even if he did, the planar shield would still be necessary to protect Innistrad. Also, Sorin was willing to go back to Zendikar with Nahiri, just not while he was still greatly weakened. In fact, following Nahiri's imprisonment, he did periodically travel back to Zendikar to check on the Eldrazi and make sure they hadn't escaped.
On the other hand, Sorin acted like a complete jerk to Nahiri by condescending her and dismissing her valid concerns so flippantly. To me, the problem wasn't so much what he said as how he said it. He was completely right, but he still was a dick about it, as is his nature. That said, Nahiri completely overreacted to Sorin's dickishness by trying to physically force him to come back to Zendikar with her. I can definitely understand why she was so upset by his aloof and haughty attitude, she had devoted five thousand years of her life to watching over Zendikar and had just stopped a partial Eldrazi breakout on her own, but if she had just been willing to listen a little more and let him explain that he needed time to recover his strength before he went back to Zendikar, things could've gone very differently.
Unfortunately, Sorin is exactly the type of person who won't give in to someone else's demands or allow anyone else to coerce him. He's too much of an arrogant bastard to let anyone else boss him around. Threatening Sorin was the absolute worst thing Nahiri could've done if she wanted him to agree to her request. By turning that request into a command, she ironically ensured that Sorin would never comply with it, even though he would've been receptive to it otherwise. Nahiri's first mistake was thinking that she'd earn Sorin's respect (or at least his attention and his compliance) by defeating him when the exact opposite was true. Her second mistake was continuing to attack him because "leaving things unresolved would be dangerous" even though he'd just told her that he was willing to allow her to leave in peace. I suppose she could've thought he was lying, but beyond that, I can't really see the logic of her decision there.
Even then, the situation might've been resolved peacefully if Avacyn hadn't showed up and escalated it further by trying to kill Nahiri. That led to Nahiri almost killing Avacyn in self-defense, which forced Sorin to take drastic measures to protect his newly-created angel. Sorin had no way of knowing that Nahiri was just trying to prove a point. As far as he knew, she'd tried to kill him and his daughter in a fit of rage, and she might try to do it again if he let her go. At that point, he probably felt like killing her or sealing her in the Helvault were his only options, though he seemed to deeply regret that it had come to that.
In short, they both just horribly misread the other's intentions, which led them to express their perfectly reasonable points to each other in the worst ways possible.
I don't really see an issue with Chandra's appearance. The art on Pia and Kiran's card showed that Pia was Indian and Kiran was European (or more precisely, whatever the Kaladesh equivalent of those ethnic groups would be). Chandra simply took after her father in terms of appearance, that's why she seems to be European too.
Humans are the only race (well, non-undead/demon/devil race), but I imagine that wasn't the point of the question.
It's relevant because as far as we know, Innistrad is the only plane that has werewolves. Since humans are the only sapient race on Innistrad (not counting mana beings like angels, devils, and demons, who logically couldn't become werewolves anyway), they're the only possible race that could be afflicted with lycanthropy. (Well, unless Arlinn Kord decides to wander around the multiverse infecting people...)
Something off to me about the current storyline: Avacyn has gone mad believing the entire human population is rotten and corrupted, right? Then why bother even with a Lunarch Council? If she killed or something else killed Mikaeus' successor, why bother reorganizing the council? They're all supposed to be purged, right?
Further bothering me is that she would allow demonic consultation to occur within the council, considering she more or less believes all humans to be guilty of it, hence starting her purge. The logic doesn't flow. At all.
Avacyn doesn't control the Lunarch Council or the Inquisition. They don't follow her directly, they don't have any contact with her or her angels, and for the most part, they seem to be beneath her notice altogether. They're just doing what they think she wants them to do. They know she's slaughtering people en masse for being impure and sinful, so they're following her example. The fact that the Skirsdag cultists have infiltrated the Church doesn't help matters, nor does the madness affecting Innistrad as a whole.
Judging by the angel we see watching over Thraben without attacking anyone, Avacyn apparently decided to spare the Church for the time being, since they're helping to carry out her work. That's the full extent of the connection between them, though, and I have no doubt that Avacyn eventually plans to slaughter all of her human followers too.
So the angels and the Inquisition are two seperate factions.
Very lukewarm, in that they had to get the demon cultists in and just leave White villainy to the angels.
I think you're oversimplifying it. Some of the Inquisitors are secretly demon worshippers who are taking advantage of the situation for their own ends, but others are affected by the madness spreading across the plane, and others are genuinely trying to follow Avacyn's will (either out of blind devotion or simply in the hopes of being spared from her wrath), and others still are just following orders.
I used to think Djinn were more like spirits too, since that just seemed intuitive to me, but Tarkir shows that they're physical biological beings. At the very least, the Djinn on Tarkir are definitely organic lifeforms. If they're alive enough for there to be Djinn zombies, they're alive enough for there to be Djinn Planeswalkers.
To all the people wondering why Tamiyo would send Jenrik to Markov Manor in the first place, you're missing an important piece of the puzzle.
It's been established that the vampires on Innistrad have a full-fledged aristocratic society. They have human subjects who serve them, they make deals with human traders. Yes, they have to feed on the blood of humans to survive, but they don't just go around killing every human they see. If someone showed up at their doorstep seeking to trade information, they wouldn't just tear him apart. Under normal circumstances, a trip to Markov Manor might not be a pleasant experience, but it wouldn't be a suicide mission.
The problem is that whatever force is driving Innistrad to madness is causing the vampires to lose control of their bloodlust, as we've seen on several cards. That's why the Markov vampires were ready to tear Jenrik apart as soon as he set foot in their territory: like Avacyn and her angels, they weren't themselves at the time.
On the one hand, Sorin had a perfectly valid reason for not answering Nahiri's call. He didn't receive her transmission because Avacyn's planar shield had blocked it from reaching Innistrad. Unlike Nahiri, I really can't fault him for that. He had no way of knowing that would happen, and even if he did, the planar shield would still be necessary to protect Innistrad. Also, Sorin was willing to go back to Zendikar with Nahiri, just not while he was still greatly weakened. In fact, following Nahiri's imprisonment, he did periodically travel back to Zendikar to check on the Eldrazi and make sure they hadn't escaped.
On the other hand, Sorin acted like a complete jerk to Nahiri by condescending her and dismissing her valid concerns so flippantly. To me, the problem wasn't so much what he said as how he said it. He was completely right, but he still was a dick about it, as is his nature. That said, Nahiri completely overreacted to Sorin's dickishness by trying to physically force him to come back to Zendikar with her. I can definitely understand why she was so upset by his aloof and haughty attitude, she had devoted five thousand years of her life to watching over Zendikar and had just stopped a partial Eldrazi breakout on her own, but if she had just been willing to listen a little more and let him explain that he needed time to recover his strength before he went back to Zendikar, things could've gone very differently.
Unfortunately, Sorin is exactly the type of person who won't give in to someone else's demands or allow anyone else to coerce him. He's too much of an arrogant bastard to let anyone else boss him around. Threatening Sorin was the absolute worst thing Nahiri could've done if she wanted him to agree to her request. By turning that request into a command, she ironically ensured that Sorin would never comply with it, even though he would've been receptive to it otherwise. Nahiri's first mistake was thinking that she'd earn Sorin's respect (or at least his attention and his compliance) by defeating him when the exact opposite was true. Her second mistake was continuing to attack him because "leaving things unresolved would be dangerous" even though he'd just told her that he was willing to allow her to leave in peace. I suppose she could've thought he was lying, but beyond that, I can't really see the logic of her decision there.
Even then, the situation might've been resolved peacefully if Avacyn hadn't showed up and escalated it further by trying to kill Nahiri. That led to Nahiri almost killing Avacyn in self-defense, which forced Sorin to take drastic measures to protect his newly-created angel. Sorin had no way of knowing that Nahiri was just trying to prove a point. As far as he knew, she'd tried to kill him and his daughter in a fit of rage, and she might try to do it again if he let her go. At that point, he probably felt like killing her or sealing her in the Helvault were his only options, though he seemed to deeply regret that it had come to that.
In short, they both just horribly misread the other's intentions, which led them to express their perfectly reasonable points to each other in the worst ways possible.
It's relevant because as far as we know, Innistrad is the only plane that has werewolves. Since humans are the only sapient race on Innistrad (not counting mana beings like angels, devils, and demons, who logically couldn't become werewolves anyway), they're the only possible race that could be afflicted with lycanthropy. (Well, unless Arlinn Kord decides to wander around the multiverse infecting people...)
Avacyn doesn't control the Lunarch Council or the Inquisition. They don't follow her directly, they don't have any contact with her or her angels, and for the most part, they seem to be beneath her notice altogether. They're just doing what they think she wants them to do. They know she's slaughtering people en masse for being impure and sinful, so they're following her example. The fact that the Skirsdag cultists have infiltrated the Church doesn't help matters, nor does the madness affecting Innistrad as a whole.
Judging by the angel we see watching over Thraben without attacking anyone, Avacyn apparently decided to spare the Church for the time being, since they're helping to carry out her work. That's the full extent of the connection between them, though, and I have no doubt that Avacyn eventually plans to slaughter all of her human followers too.
I think you're oversimplifying it. Some of the Inquisitors are secretly demon worshippers who are taking advantage of the situation for their own ends, but others are affected by the madness spreading across the plane, and others are genuinely trying to follow Avacyn's will (either out of blind devotion or simply in the hopes of being spared from her wrath), and others still are just following orders.
It's been established that the vampires on Innistrad have a full-fledged aristocratic society. They have human subjects who serve them, they make deals with human traders. Yes, they have to feed on the blood of humans to survive, but they don't just go around killing every human they see. If someone showed up at their doorstep seeking to trade information, they wouldn't just tear him apart. Under normal circumstances, a trip to Markov Manor might not be a pleasant experience, but it wouldn't be a suicide mission.
The problem is that whatever force is driving Innistrad to madness is causing the vampires to lose control of their bloodlust, as we've seen on several cards. That's why the Markov vampires were ready to tear Jenrik apart as soon as he set foot in their territory: like Avacyn and her angels, they weren't themselves at the time.