Nirbrimba, Raging Lord

Flying, trample, vigilance, riot

Nirbrimba, Raging Lord costs {x} less to cast where
X is the highest power among dragons you control.

Other dragon spells you control have riot and trample.

Whenever one or more +1/+1 counters is put on Nirbrimba, Raging Lord, put a +1/+1 counters on each dragon you control.