Lethal Vapors + Phyrexian Revoker
Lethal Vapors must be on the battlefield. Phyrexian Revoker must be on the battlefield. "Lethal Vapors" chosen with Phyrexian Revoker.
- Whenever a creature enters the battlefield, Lethal Vapors triggers, destroying that creature.
- 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.