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.
{W}{U}{B}{R}{G}: Return Chamber Sentry from your graveyard to your hand.
NM-Mint - $0.10
NM-Mint Non English - $0.10
Lightly Played - $0.10
Lightly Played Non English - $0.10
Moderately Played - $0.10
Moderately Played Non English - $0.10
Heavily Played - $0.10
Heavily Played Non English - $0.10
Damaged - $0.10
Damaged Non English - $0.10