Chamber Sentry enters the battlefield with a +1/+1 counter on it for each color of mana spent to cast it.
X, T, Remove X +1/+1 counters from Chamber Sentry: It deals X damage to any target.
WUBRG: Return Chamber Sentry from your graveyard to your hand.
Near Mint - $0.95
Near Mint Non-English - $0.95
Lightly Played - $0.90
Lightly Played Non-English - $0.90
Moderately Played - $0.76
Moderately Played Non-English - $0.76
Heavily Played - $0.57
Heavily Played Non-English - $0.57
Damaged - $0.47
Damaged Non-English - $0.47