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.
Near Mint - $0.20
Lightly Played - $0.20
Played - $0.10
Heavily Played - $0.10
Damaged - $0.10
Near Mint Non-English - $0.20
Lightly Played Non-English - $0.20
Played Non-English - $0.10
Heavily Played Non-English - $0.10
Damaged Non-English - $0.10