Rottenmouth Viper Finish:Foil return it to the battlefield

return it to the battlefield under its owner's control with a +1/+1 counter on it

Terra gains flying until end of turn

Mobilize 2 (Whenever this creature attacks

Draw a card for each permanent destroyed this way

The Aetherspark can't be attacked and has "Whenever equipped creature deals combat damage during your turn

Rottenmouth Viper Finish:Foil return it to the battlefieldAs 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 this creature 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 of their choice or discards a card.