Elusa, the dark

+2: Create a dark mask enchantment token with"the enchanted creature gains undying" and attach it to target creture you control.
-3: all creatures enchanted with a mask token become a copy of target creature your oponnent control, and destroy that creature
-7: you get an emblem with:"at the beggining of your upkeep create a token that it's a copy of an Elusa planeswalker"