Lethal Vapors + Phyrexian Revoker

Lethal Vapors
Phyrexian Revoker

Lethal Vapors must be on the battlefield. Phyrexian Revoker must be on the battlefield. "Lethal Vapors" chosen with Phyrexian Revoker.
  1. Whenever a creature enters the battlefield, Lethal Vapors triggers, destroying that creature.
  2. Because Phyrexian Revoker prevents Lethal Vapors's activated ability from being activated, it cannot be destroyed due to its ability.
Destroy all creatures that enter the battlefield.