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Karumonix, the Rat King

First printed in Phyrexia: All Will Be One (2023)

All 6 prints

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Karumonix, the Rat King

Legendary Creature — Phyrexian Rat

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)
Other Rats you control have toxic 1.
When Karumonix enters, look at the top five cards of your library. You may reveal any number of Rat cards from among them and put the revealed cards into your hand. Put the rest on the bottom of your library in a random order.

3/3

Illustrated by
Helge C. Balzer

Legality

Rulings (7)

  • Conversely, replacement effects that apply to the number of counters put on a player can modify the counters placed this way. For example, Vorinclex, Monstrous Raider's last two abilities can apply to counters placed this way.
  • Any other effects of that damage, such as life gain from lifelink, still apply.
  • Damage dealt by a creature with toxic grants the same number of counters regardless of how much damage is dealt. Notably, if a replacement effect modifies the damage in some way (such as that of Gratuitous Violence), the number of counters given remains unchanged.
  • A player with ten or more poison counters loses the game. This is a state-based action and doesn't use the stack. In other words, it happens immediately and players can't respond to it, just like a player losing the game due to having 0 or less life.
  • If a creature with toxic deals combat damage to a creature or planeswalker, or if it deals noncombat damage, toxic has no effect and no player gets poison counters.
  • Toxic doesn't change the amount of combat damage a creature deals. For example, if a 2/2 creature with toxic 1 deals combat damage to a player, that creature will deal 2 damage. The results of that damage are the player loses 2 life and gets a poison counter.
  • Multiple instances of toxic are cumulative. For example, if a creature has toxic 2 and gains toxic 1 due to another effect, combat damage that creature deals to a player will cause that player to get 3 poison counters.

Prices

MTGO price: 0.006 TIX, the cheapest non-foil print (average sell price on GoatBots, 1 Nov 2026).

In Limited on MTG Arena

Win rates in Arena drafts and sealed, retrieved from 17Lands (CC BY 4.0).

Win rates of Karumonix, the Rat King in Limited
Set GIH WR vs set IWD Games
Phyrexia: All Will Be One (ONE), Premier Draft 51.5% -3.3 -1.2 4115
Phyrexia: All Will Be One (ONE), Sealed 55.4% -1.0 -1.5 641
GIH WR
win rate of the games in which the card was in the opening hand or drawn
vs set
points above or below the average win rate of all decks in the set
IWD
improvement when drawn: GIH WR minus the win rate when the card stayed in the library
Games
games in which the card was seen

Commander In 1 of 5780 decks (0.0%), most in Totentanz, Swarm Piper

Share of decks
0.0%
= vs previous 30 days
2026-08-17: 0.0% 2026-08-24: 0.0% 2026-08-31: 0.1% 2026-09-07: 0.0% 2026-09-14: 0.1% 2026-09-21: 0.0% 2026-09-28: 0.1% 2026-10-05: 0.0% 2026-10-12: 0.1% 2026-10-19: 0.0% 2026-10-26: 0.0%
Weekly, last 90 days
Decks
1
1 main, 0 sideboard
Avg. copies
1.0
in the main deck
Win rate
–
0 top 8 (challenges only)

Archetypes by metagame share

Archetype Meta Play it
Totentanz, Swarm Piper 0.0% 100%

Played together with

Not enough decks yet.

Best win rate

No challenge results yet.

Challenges only: MTGO publishes only the 5-0 league decks.

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