Oath of Liliana 
Legendary Enchantment
When Oath of Liliana enters, each opponent sacrifices a creature of their choice. At the beginning of each end step, if a planeswalker entered the battlefield under your control this turn, create a 2/2 black Zombie creature token.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL