Goblin Catastrophe

At the beginning of your upkeep, remove all catastrophe scale counters on Goblin
Catastrophe, then pay {x}. Put X catastrophe
scale counters on Goblin Catastrophe.
{2}{r}, {t}: Create X 1/1 goblin creature tokens,
and assemble X contraptions, where X is the
number of catastrophe scale counters on Goblin Catastrophe.