Sentry Bot 
Artifact Creature — Robot2/5
Oracle text (EN)
Artifact Creature — Robot
Flash
This spell costs 
less to cast for each creature attacking you.
When this creature enters, you get 
for each creature attacking you.
At the beginning of combat on your turn, you may pay . If you do, put a +1/+1 counter on each creature you control.
Printing details
- Set
- PIP · 24
- Rarity
- Rare
- Language
- EN
- Artist
- Anthony Devine
- Released
- 2024-03-08
- Prices
- €0.20 · $0.21
Price history
The trend shows with at least 7 days of history.
- Cardmarket, trend
- CardTrader, Near Mint minimum (EN)
The history starts on October 28, 2026 and grows every day.
Show the data
| Date | Cardmarket, trend | CardTrader, Near Mint minimum (EN) |
|---|---|---|
| November 2, 2026 | €0.28 | €0.22 |
| October 31, 2026 | €0.20 | €0.22 |
| October 29, 2026 | €0.21 | €0.22 |
| October 28, 2026 | €0.21 | €0.23 |
Prices
| Source | Non-foil | Foil |
|---|---|---|
| Cardmarket | low – trend €0.28 30-day avg €0.22 | low €0.12 trend €0.38 30-day avg €0.35 |
| CardTrader (EN) | NM from €0.22 with Zero from €0.22 | NM from €0.50 with Zero from €0.50 |
| CardTrader (any language) | NM from €0.22 | NM from €0.50 |
Cardmarket updated Nov 2, 2026 · CardTrader updated Nov 2, 2026
Buy and look up
Legality
- standard Not legal
- pioneer Not legal
- modern Not legal
- legacy Legal
- vintage Legal
- commander Legal
- pauper Not legal
- alchemy Not legal
- brawl Not legal
- competitivebrawl Not legal
- duel Legal
- future Not legal
- gladiator Not legal
- historic Not legal
- oathbreaker Legal
- oldschool Not legal
- paupercommander Not legal
- penny Not legal
- predh Not legal
- premodern Not legal
- standardbrawl Not legal
- timeless Not legal
- tlr Not legal
Rulings
-
The cost-reduction ability of Sentry Bot doesn’t change its mana cost or mana value, only the total cost you pay. Specifically, the mana value of Sentry Bot is always 5.
-
Some spells and abilities that give you
may require targets. If each target chosen is an illegal target as that spell or ability tries to resolve, it won’t resolve. You won’t get any . -
Once you announce that you’re casting Sentry Bot, no player may take actions until you’re done casting it. Notably, opponents can’t remove creatures from combat to try to change Sentry Bot’s total cost.
-
Some triggered abilities that state that you “may pay” a certain amount of
describe an effect that happens “If you do.” In that case, no player may take actions to try to stop the ability’s effect after you make your choice. If the payment is followed by the phrase “When you do,” then you’ll choose any targets for that reflexive triggered ability and put it on the stack before players can take actions. -
Keep track of how many energy counters each player has. Potential ways to track this include writing them down on paper or using dice, but any method that is clear and mutually agreeable is fine. (At higher levels of tournament play, dice may not be allowed for tracking counters that players have.)
-
If a spell or ability with one or more targets states that you “may pay” some amount of
, and each permanent that it targets has become an illegal target, the spell or ability won’t resolve. You can’t pay any even if you want to. -
Use the number of creatures attacking you as Sentry Bot’s third ability resolves to determine the number of energy counters you get.
-
Some triggered abilities state that you “may pay” a certain amount of
. You can’t pay that amount multiple times to multiply the effect. You simply choose whether or not to pay that amount of as the ability resolves. -
Energy counters are a kind of counter that a player may have. They’re not associated with any specific permanents.
-
If an effect says you get one or more
, you get that many energy counters. To pay one or more , you lose that many energy counters. You can’t pay more energy counters than you have. Any effects that interact with counters a player gets, has, or loses can interact with energy counters. -
Energy counters aren’t mana. They don’t go away as steps, phases, and turns end, and effects that add mana “of any type” can’t give you energy counters.
- is the energy symbol. It represents one energy counter.