Velzareth & Thamira

Flying, Menace, Lifelink
When Velzareth & Thamira enters the battlefield, you may return up to one creature card from any graveyard to the battlefield under your control. It becomes a Demon in addition to its other types.

At the beginning of your end step, if a creature died this turn, create a 3/3 black Demon token with flying.

Bloodbond — Whenever you sacrifice creature, you may pay {1}{b}, If you do, target opponent sacrifices a creature and loses 2 life.