When Cloister Gargoyle enters the battlefield, venture into the dungeon. (Enter the first room or advance to the next room.) As long as you've completed a dungeon, Cloister Gargoyle gets +3/+0 and has flying.
NM-Mint - $0.20
Lightly Played - $0.20
Moderately Played - $0.20
Heavily Played - $0.20
Damaged - $0.20
NM-Mint Non English - $0.20
Lightly Played Non English - $0.20
Moderately Played Non English - $0.20
Heavily Played Non English - $0.20
Damaged Non English - $0.20