Treetop Hobgoblin

Ambush {3}{r}{g}{g} (You may cast this spell for
its ambush cost any time you could cast an instant. If you do, it gains haste, and it's returned from the battlefield to its owner's hand
at the beginning of the next end step.)
When Treetop Hobgoblin enters the battlefield, create a 1/1 green Snake creature token with wither.