Card

Chamber Sentry

Mana cost {X}

Artifact Creature — Construct 0/0

This creature enters with a +1/+1 counter on it for each color of mana spent to cast it. {X}, {T}, Remove X +1/+1 counters from this creature: It deals X damage to any target. {W}{U}{B}{R}{G}: Return this card from your graveyard to your hand.

Part of 33 known combos, one of them two-card. 6 official rulings.

Commander
Legal
Printing
Rare · GRN · #232
Cheapest printing
€0.12
EDHREC salt
0.40
Color identity
Black, Green, Red, Blue, White

Scryfall · EDHREC

Bracket

  • B1 Exhibition — Not in the same deck as its two-card combo partner: Enduring Renewal
  • B2 Core — Not in the same deck as its two-card combo partner: Enduring Renewal
  • B3 Upgraded — allowed: Its two-card combos are not early, which Bracket 3 allows
  • B4 Optimized — allowed: No restriction beyond the banned list
  • B5 cEDH — allowed: No restriction beyond the banned list

Why

  • Two-card combo with Enduring Renewal (none of them early)

How Lotus Vault estimates a bracket

Bracket: Lotus Vault analysis, with Commander Spellbook flags

Combos

33 known combos, one of them two-card.

Combos: Commander Spellbook

Rulings

  • 2018-10-05 · Wizards of the Coast
    You can choose any value for X as you cast Chamber Sentry. The value chosen for X doesn't directly affect the number of +1/+1 counters Chamber Sentry enters the battlefield with, but it does let you pay more mana and thus spend more colors of mana to cast it.
  • 2018-10-05 · Wizards of the Coast
    If Chamber Sentry enters the battlefield without being cast, it receives no +1/+1 counters.
  • 2018-10-05 · Wizards of the Coast
    If an effect allows you to spend mana as though it were mana of any color to cast Chamber Sentry, you consider only the actual mana spent to determine how many counters it receives.
  • 2018-10-05 · Wizards of the Coast
    If another creature enters the battlefield as a copy of Chamber Sentry, consider what mana was spent to cast that creature to determine how many +1/+1 counters it enters with.
  • 2018-10-05 · Wizards of the Coast
    Colorless mana won't give Chamber Sentry another +1/+1 counter. Colorless is not a color.
  • 2018-10-05 · Wizards of the Coast
    The value of X chosen when you activate Chamber Sentry's first activated ability doesn't have to be the same value of X that you chose when you cast it.

Rulings: Scryfall · Wizards of the Coast