Brabas, Hound of Wolfe

Tap an untapped green creature you control:
Put a +1/+1 counter on Barbas, Hound of Wolfe
and tap it.
{g}{g}{g}: Barbas, Hound of Wolfe gains trample
until end of turn.
{5}{g}{g}{t}: Creatures you control gain trample
until end of turn.