There is a little context as to how Karn went back in time, He was designed to be a Time Traveler Originally (hence why he is made of Silver, it is apparently immune to the damage from time travel) and he has traveled back through time before, so he has experience with it so going through a "Time Rift" to a specific spot in time isn't a huge leap for him to do.
Doesn't make much sense still though, but..well Time magic in MTG is strange anyways. *looks at Sarkhan*
Because their involvement usually lead to hilarious train wrecks.
Because Innistrad Vampires are different, Sorin isn't a "real" vampire in the sense of Dracula lord of vampires. His Uncle made him drink a mix of Angel and Demon blood that granted him immortality and a thirst for blood. He never really "died" which is why he still has his spark.
We don't know that, if he could get people out of it why didn't he take Avacyn Out?
And Nahiri didn't handle how she felt very well, Sorin was working on something and missed the Phonecall about the Eldrazi and she came in very angry and demanding why he didn't pick up the phone while he was a little bit busy, so she showed up angry and potentially violent.
Just like every other Old Walker, Nahiri Included, because instead of keeping an eye on the Eldrazi's seal she went to sleep which allowed people to Deify the Eldrazi and toy with the Hedrons. Do you know what maybe would have prevented the Eldrazi from leaking through the seals the first time? The person who was supposed to be watching them actually watching them and going to get Ugin(maybe) and Sorin when it first started happening, so it could be fixed before it became a problem. Nahiri and Sorin's lovers spat is entirely "everybody is freaking wrong because Oldwalkers were freaking children a vast majority of the time."
It isn't like Ravnica doesn't have a bunch of Kaiju about to have gigantic monster fights with the gods.
If the card is any indication, the off switch is "Smash it with a hammer"
He isn't he is angry and setting fire to everything. Nobody is really on "Bolas" side because all the walkers on the plane are targets to get their sparks stolen.
It is becoming clear that the Beacon is forcing planeswalkers to come, the majority of the Planeswalkers here have absolutely no reason to actually go to Ravnica naturally, and don't have personality types that would bring them to a place because something shiny is going on. Angrath has exactly zero reason to go walking anywhere given that War can't be taking place to long after Ixalan, same with Sorin who was trapped.
Me too, He saw Zombies wrecking the place..took control of them and is now Doom Marineing on EVERYBODY.
Here is a really dark secret, I once won my LGS's modern FNM..with Tibalt.
Oddly enough, I think Tibalt is the best of the ones that don't have + effects, he fills the same sort of role as Sulfuric Vortex, but doesn't have the downside of you taking damage as well.
How does it fit with her Story Arc?
Can't says other.
I doubt it, I think they are just the uncommon ones so that the limited format doesn't completely devolve into standstills. They have no + abilities and - abilities that won't kill them, so they can activate abilities..then stick around for their passive effect.
Not just things for free, things for free..from the top of your library. Being able to cast things from the top of the Library has proven pretty potent.