Goblin Horde

Dash{4}{r}{r}
When you cast Goblin Horde for its dash cost, put 4 1/1 red Goblin creature tokens onto the battlefield.
Overwhelm: When Goblin Horde and at least 5 other creatures attack, if 5 of them are Goblins, all goblins you control become copies of Goblin Horde until end of turn.
Goblin Horde's power is equal to the number of Goblins you control