Good boy

Reach, vigilance, first strike, trample
Whenever Good boy attacks you may pay {g/w}. If you do, create a 1/1 Cat creature token.
If you control three or more creatures, Good boy has indestructible.
Good boy gets +1/+1 for each creature tiken you control.
At the beginning of your precombat main fase add {g}{g},{g}{w},or{w}{w}.