Maythas, Sage of Necromancy

Other Zombies and Skeletons you control have +1/+1.

Whenever a Zombie or Skeleton you control dies, you may pay {1}{w}. If you do, you gain life equal to that creature's power.

Pay X life: Return target Zombie or Skeleton creature card with a converted mana cost of X
or less from your graveyard to the battlefield tapped.