Titann, Mutant Hunter

Trample, Menace
{5}{g/u}, {t}: Adapt 5, then draw a card.
Whenever Titann fights a blue and green
creature, it gets +6/+6 until end of turn.
At the beginning of each end step, you may
remove 3 +1/+1 counters from Titann. If you
do, Titann fights target creature you don't
control.