Rottenmouth Viper pneo Remove a charge counter from

Remove a charge counter from Mirrodin's Core: Add one mana of any color

You may put an instant or sorcery card milled this way into your hand

put a creature card exiled with Emperor of Bones onto the battlefield under your control with a finality counter on it

Put target face-up exiled card into its owner's graveyard

Rottenmouth Viper pneo Remove a charge counter fromAs 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.