Cho'Gath, Terror of the Void

Whenever a creature dies that Cho'Gath has dealt damage to this turn, put a +1/+1 counter on
Cho'Gath.
If Cho'Gath has at least X +1/+1 counters on him
he gets-
Intimidate where X is 2, Menace where X is 4,
Shroud where X is 6
{6}{g}{g}: Monstrosity 4
"Your darkness beckons."
-Cho'Gath