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.
MTG · Card
◇ Catalog #97
Big Mother Mouser
tmc·#97·rare·borderless
Illus. Kirokaze
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in vault
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for trade
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wishlisted
Mar '26
3 mo ago
Value
$49.36$1 (-1.9%)
30 days high $50 · low $48
Volatility · moderate
Tracking since · May 5, 2026
EUR€34.47USD$49.36TIX
Where to buy / sell
Search links · prices vary by venue
Buy this card
Played in EDH
EDHrec rank #7,494 · Niche pick
Variants
Gameplay
Artifact Creature — Robot
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.
0/0
Legalities
tlrnot legal
duellegal
brawlnot legal
pennynot legal
PreDHnot legal
Rulings · 2
wotc
wotc
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.
Notes
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Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Kirokaze
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
