Torment

Slithery Stalker

Swampwalk
When Slithery Stalker comes into play, remove target green or white creature an opponent controls from the game.
When Slithery Stalker leaves play, return the removed card to play under its owner's control.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
When Slithery Stalker enters, exile target green or white creature an opponent controls.
When Slithery Stalker leaves the battlefield, return the exiled card to the battlefield under its owner's control.