Bloated Contaminator

Commanders that run Bloated Contaminator most

Deck counts from EDHREC.

• Atraxa, Praetors' Voice: 15,997 decks
• Fynn, the Fangbearer: 10,284 decks
• Ixhel, Scion of Atraxa: 4,976 decks
• Vishgraz, the Doomhive: 3,278 decks
• Slinza, the Spiked Stampede: 3,235 decks
• The Serpent Society: 1,827 decks
• Agent Frank Horrigan: 1,201 decks
• Ezuri, Stalker of Spheres: 1,010 decks

Often played with Bloated Contaminator

Cards that show up in the same decks on EDHREC.

• Kuldotha Cackler
• Forgehammer Centurion
• Urabrask's Anointer
• Magmatic Sprinter
• Axiom Engraver
• Cinderslash Ravager
• Free from Flesh
• Churning Reservoir
• Furnace Strider
• Shaleskin Bruiser

Rulings

• 2023-02-04: You don't have to choose every permanent or player that has a counter, only the ones you want to add another counter to. Since "any number" includes zero, you don't have to choose any permanents at all, and you don't have to choose any players at all.
• 2023-02-04: Players can respond to a spell or ability whose effect includes proliferating. Once that spell or ability starts to resolve, however, and its controller chooses which permanents and players will get new counters, it's too late for anyone to respond.
• 2023-02-04: If a player or permanent has more than one kind of counter on it, and you choose for it to get additional counters, it must get one of each kind of counter it already has. You can't have it get just one kind of counter it already has and not the others.
• 2023-02-04: 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.
• 2023-02-04: 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.
• 2023-02-04: If a permanent ever has both +1/+1 counters and -1/-1 counters on it at the same time, they're removed in pairs as a state-based action so that the permanent has only one of those kinds of counters on it.
• 2023-02-04: 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.
• 2023-02-04: To proliferate, you can choose any permanent that has a counter, including ones controlled by opponents. You can choose any player who has a counter, including opponents. You can't choose cards in any zone other than the battlefield, even if they have counters on them.
• 2023-02-04: Any other effects of that damage, such as life gain from lifelink, still apply.
• 2023-02-04: 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.
• 2023-02-04: An ability that triggers "Whenever you proliferate" triggers even if you chose no permanents or players while doing so.
• 2023-02-04: 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.
• 2023-02-04: 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.