Rubblefort dojo

Creatures you control have haste
Sacrifice a land: tap up to three target creatures
At the beginning of your upkeep, choose one:
• create x 1/1 goblin creature tokens with prowess, where x is the total number of tapped creatures on the battlefield
•deal up to 10 damage split among any number of tapped creatures
just because goblins train there doesn't mean they are any more safe