Docklands Grenadier

{g/w}, {t}: Target creature gets +3/+0
until end of turn.
{r/g}, {t}: Target creature gains trample
until end of turn.
{r/w}, {t}: Target creature gains first strike
until end of turn.
If two other creatures you control are attacking,
untap this creature. If this creature is untapped
this way, it gains double strike and must
attack this turn.