Unholy Indenture 
Enchantment — Aura
Enchant creature When enchanted creature dies, return that card to the battlefield under your control with a +1/+1 counter on it.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL