Grenzo, Dungeon Warden enters the battlefield with X +1/+1 counters on it.
2: Put the bottom card of your library into your graveyard. If it's a creature card with power less than or equal to Grenzo's power, put it onto the battlefield.
NM-Mint - $3.80
Lightly Played - $3.60
Moderately Played - $3.40
Heavily Played - $3.00
Damaged - $2.50
NM-Mint Non English - $3.80
Lightly Played Non English - $3.60
Moderately Played Non English - $3.40
Heavily Played Non English - $3.00
Damaged Non English - $2.50