Igor, Goblin Berserker

Igor, Goblin Berserker gets +1/+0 if you
control another mono colored Goblin
Igor, Goblin Berserker Gets +1/+1 and
Haste if you control a multi colored
Goblin
{r}-Sacrifice a Goblin Igor, Goblin Berserker
gets +2/+2 and trample until end of turn