Signature Slam
Signature Slam: Instant, Modern Horizons 3. MTG card details, printings, market prices, official rulings, and format legality, all in one place on Mana Grove.
- Mana cost
- {2}{G}
- Mana value
- 3
- Type
- Instant
- Colour identity
- Green (G)
- Rarity
- Uncommon
- Set
- Modern Horizons 3 (MH3)
- Released
- 2024-06-14
- Collector number
- 168
- Artist
- Slawomir Maniak
- Commander rank
- 7,681 (by how often it appears in Commander decks)
Build around this card with Grover
About Signature Slam
Signature Slam is a Magic: The Gathering card, an uncommon green instant from Modern Horizons 3 (MH3), a draft-focused set released in June 2024. It is collector number 168 in that set, with art by Slawomir Maniak. It costs {2}{G} (two generic and one green mana) to cast, for a mana value of 3. Its colour identity is green. It is legal in Modern, Legacy, Vintage, Commander, Duel Commander, Oathbreaker, Brawl, Historic, Timeless and Gladiator. Modern Horizons 3 is its only printing so far. The latest aggregated market price for this printing is $0.21 (normal finish, as of 2026-11-01).
Card text
Put a +1/+1 counter on target creature you control, then each modified creature you control deals damage equal to its power to target creature you don't control. (Equipment, Auras you control, and counters are modifications.)
A lone dinosaur in gorilla territory doesn't stand a chance.
Market price
Latest aggregated market price for the normal finish of this printing: $0.21 (as of 2026-11-01).
The figure covers this printing only; other printings carry their own price on their own page.
Format legality
Legality of Signature Slam by format. Formats in which it is not legal are not listed.
| Modern | Legal |
|---|---|
| Legacy | Legal |
| Vintage | Legal |
| Commander | Legal |
| Duel Commander | Legal |
| Oathbreaker | Legal |
| Brawl | Legal |
| Historic | Legal |
| Timeless | Legal |
| Gladiator | Legal |
Official rulings
Five official rulings apply to Signature Slam, newest first.
- A creature that is equipped is considered modified no matter who controls the Equipment that's attached to it.
- If the creature you control is an illegal target as Signature Slam tries to resolve but the creature you don't control is still a legal target, each modified creature you control (which may include the target creature you control if it's still on the battlefield) will still deal damage equal to its power to the creature you don't control.
- An Aura controlled by another player does not cause a creature you control to be modified.
- A creature with a counter on it is considered modified no matter what kind of counter it is or which player put it on that creature.
- If the creature you don't control is an illegal target as Signature Slam tries to resolve but the creature you control is a legal target, you'll still put a +1/+1 counter on the target creature you control.
Similar cards
Other instant cards with a green colour identity, ranked by how often they appear in Commander decks.
In these card lists
These card lists include Signature Slam.