Keeper of the Dusty Crevice

Deathtouch
Keeper of the Dusty Crevice enters the battlefield
with X dust counters on it. If you control Dusty Crevice you may activate that card's ability for {X}
less to activate where {X} is the numbers of dust counters on Keeper of the Dusty Crevice.
If you control Dusty Crevice, Keeper of the Dusty Crevice gains "{2}{u}{b}:Keeper of the Dusty Crevice
gets +2/+2 for each dust counter on it and gains
menace and trample until the end of turn ."