Deranged Beastmaster

When you cast Deranged Beastmaster, if it wasn't countered, gain control of target creature with power 4 or greater until the end of turn. Untap it. It gains haste and trample until the end of turn.
Transcendent {r}{g} (You may cast this spell for its Transcendent cost any time you could cast an instant. If you do, it's an instant instead of its other types.)