Kenvoc, Izzorius Dictator

Flying, vigilance, haste
Creatures you control have vigilance.
Whenever a creature you control with flying attacks, put a silence counter on Kenvoc.
At the beginning of each combat phase, choose a creature for each silence counter on Kenvoc. Those creatures can't attack.
At the beginning of your upkeep, if you control 5 or more creatures with flying, remove all silence counters from Kenvoc.
"Silence, you fools!" - Kenvoc