Necromancer's Familiar 
Creature — Bird Spirit
Flying
Hellbent — This creature has lifelink as long as you have no cards in hand.
, Discard a card: This creature gains indestructible until end of turn. Tap it.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL