Big Mother Mouser

Mana cost: {4}
Type: Artifact Creature — Robot
Power / toughness: 0 / 0
Set: Teenage Mutant Ninja Turtles Eternal #37 (rare)
Price: $1.17 USD

This creature enters with two +1/+1 counters on it.
Whenever this creature attacks, double the number of +1/+1 counters on it.
When this creature dies, create a number of 1/1 colorless Robot artifact creature tokens equal to the number of +1/+1 counters on this creature.

Big Mother Mouser has 2 printings, first in Teenage Mutant Ninja Turtles Eternal (2026). EDHREC ranks it #4,623 among Commander cards. It appears most in Dr. Eggman decks (1,858 on EDHREC). 1 public deck on TCG runs it. It has 2 official rulings.

Legality

commander: legal
legacy: legal
vintage: legal
pauper: not legal
modern: not legal
pioneer: not legal
standard: not legal
brawl: not legal

Public decks that run Big Mother Mouser

Turtle Power! - Teenage Mutant Ninja Turtles Commander Deck, led by Heroes in a Half Shell

Commanders that run Big Mother Mouser most

Deck counts from EDHREC.

Often played with Big Mother Mouser

Cards that show up in the same decks on EDHREC.

Rulings

2026-01-27: To double the number of +1/+1 counters on a creature, put a number of +1/+1 counters on it equal to the number it already has. Other cards that interact with putting counters on it will interact with this effect accordingly.
2026-01-27: If enough -1/-1 counters are put on Big Mother Mouser at the same time to make its toughness 0 or less (or the damage marked on it to be lethal), the number of +1/+1 counters on it before it got any -1/-1 counters will be used to determine how many Robot tokens you get. For example, if there are three +1/+1 counters on Big Mother Mouser and it gets four -1/-1 counters, you'll get three Robot tokens. That's because Big Mother Mouser's last ability checks Big Mother Mouser's existence just before it leaves the battlefield, and it still has all those counters on it at that point.