Valkyrie Harbinger 
Creature — Angel Cleric
Flying Lifelink (Damage dealt by this creature also causes you to gain that much life.) At the beginning of each end step, if you gained 4 or more life this turn, create a 4/4 white Angel creature token with flying and vigilance.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL