Tenured Inkcaster 
Creature — Vampire Warlock
When this creature enters, put a +1/+1 counter on target creature. Whenever a creature you control with a +1/+1 counter on it attacks, each opponent loses 1 life and you gain 1 life.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL