MTG Salvation

Planeswalkers with kicker. Because they didn't have enough text already.

I'm pretty sure this isn't good, but I could be wrong.

It doesn't do anything to protect itself except that there may be 2 of them to kill.

And it doesn't do anything spectacular.

It's primed to replace Narset when she rotates. Sure, Jace lacks the static ability, but provides card advantage at any loyalty, can even draw lands at no detriment to loyalty, won't "miss" on hits with the card draw ability like Narset's -2 can (occasionally), and has Castle Vantress's Scry ability as a +2 whereas Narset cannot tick up.

All this before making use of his Kicker ability which is quite well designed. At the very least, you can use the Copy's (0) to get a card draw, which is the absolute standard of 2 = draw a card. Alternatively, you can stack scry's and draws between the two Jaces scry closer to answers or just manage loyalty for draws so Jace sticks around.

Personally, this card seems like a slam dunk for control decks. 4-of, easy. Legend ruling Narsets on (1), often felt kind of bad. If you can amass numerous Copy's by kicking multiple Jaces to replace to legend rule or lost to its card draw, you can have massive amounts of topdeck control through multiple scrys or card draw, all while putting multiple bodies on the field that the opponent will have to consider attacking or ignoring.

Two Sarkhan the Bads for the price of one?

Is Fae of wishes CMC 2 or 6 for purposes of ability 2? I know Discovery // Dispersal is CMC 7, but I wouldn't swear to adventures working the same way. I think its been a while since an interaction like this has been relevant so I never learned how it works with adventures.

From the rulings:

An adventurer card is a creature card in every zone except the stack, as well as while on the stack if not cast as an Adventure. Ignore its alternative characteristics in those cases. For example, while it’s in your graveyard, Giant Killer is a white creature card whose converted mana cost is 1. It can’t be the target of the triggered ability of Mystic Sanctuary.

As such, the cards will always be considered creature cards with CMC equal to the cost printed in the top right corner of the card, unless cast as an Adventure. It does have quite a bit of relevance even in standard, for example:

If Keruga, the Macrosage is your companion, you may play Brazen Borrower and Bonecrusher Giant as well as their Adventure spells, but not Faerie Guidemother.

Shark Typhoon's triggered ability will see a cast Granted for CMC of 4, not 2 or 6, and create a 4/4 Shark token.

Discarding a Bonecrusher Giant to Narset of the Ancient Way
's (-2) will deal 3 damage, not 2 or 5. But as you acknowledge, discarding Warrant // Warden would deal 7.