Wayward Servant

Oracle Text

Whenever another Zombie enters the battlefield under your control, each opponent loses 1 life and you gain 1 life.

Card Rulings

4/18/2017 If Wayward Servant enters the battlefield at the same time as another Zombie creature, its ability triggers for that Zombie.
4/18/2017 In a Two-Headed Giant game, the triggered ability of Wayward Servant causes the opposing team to lose 2 life and you gain 1 life.