The Mind Flayer

The Mind Flayer enters the battlefield with a
hive counter on it.
As long as The Mind Flayer has a hive counter
on it, it's a emblem. (It's not a creature.)
{b}{b}: Put a Hive counter on another target
creature, then if there a six or more creatures
with hive counters on them, destroy them, then
remove all hive counters from all cards,
permanents, and players.