Tergrid's Casting Cost

Whenever you cast Tergrid, God of Fright
from your command zone put two cast counters on Tergrid's Casting Cost. As an additional cost to cast Tergrid, God of Fright, pay {x}, where {x} is the number of
cast counters on Tergrid's Casting Cost.
Yeah I'll take your permanents, hand it over.