Steve, Undying

+2: Destroy target creature. Create an X/X Spirit creature token that is all colours, where X is the destroyed creature's power.
-4: Create Diamond Sword, a Legendary Artifact that has tap: Deal 7 damage to target creature or pLaneswalker.
-8: Remove all legendary cards from play. Search each player's library for all of their legendary cards, then remove them from play.