Rottenmouth Viper - [Foil, Borderless] Bloomburrow (BLB) MD1 That player can untap only

That player can untap only permanents of the chosen type this step

Team TARDIS — At the beginning of your end step

Destroy all creatures

You may have Shapeshifters you control become copies of that creature until end of turn

Sacrifice a Beast: You gain 4 life

Rottenmouth Viper - [Foil, Borderless] Bloomburrow (BLB) MD1 That player can untap onlyAs 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.