Rottenmouth Viper - [Showcase] Bloomburrow (BLB) Video Game "Yawgmoth's corpse is a wound

"Yawgmoth's corpse is a wound in the universe

Nothing can take root here unless I allow it

and ambition

Sliver creatures you control have flying

When Rishadan Cutpurse enters the battlefield

Rottenmouth Viper - [Showcase] Bloomburrow (BLB) Video Game "Yawgmoth's corpse is a woundAs an additional cost to cast this spell, you may sacrifice any number of nonland permanents. This spell costs {1} less to cast for each permanent sacrificed this way. Whenever Rottenmouth Viper enters or attacks, put a blight counter on it. Then for each blight counter on it, each opponent loses 4 life unless that player sacrifices a nonland permanent or discards a card.