Jace, caller of memories

+3: you get an emblem with: at the beginning of your upkeep, if you control a planeswalker, target creature gets +0/+1 until end of turn.
-5: target creature gets: if a planeswalker you control where to leave the battlefield, sacrifice this creature, then return that card to your hand.
-15: you get an emblem with, at the beginning of your upkeep, if you control exactly 4 planeswalkers, you win the game.