Vishgraz, the Doomhive

Mana cost: {2}{W}{B}{G}
Type: Legendary Creature — Phyrexian Insect
Power / toughness: 3 / 3
Set: Phyrexia: All Will Be One Commander #4 (mythic)
Price: $1.19 USD

Menace, toxic 1 (Players dealt combat damage by this creature also get a poison counter.)
When Vishgraz enters, create three 1/1 colorless Phyrexian Mite artifact creature tokens with toxic 1 and "This token can't block."
Vishgraz gets +1/+1 for each poison counter your opponents have.

Vishgraz, the Doomhive has 2 printings, first in Phyrexia: All Will Be One Commander (2023). EDHREC ranks it #6,916 among Commander cards. It appears most in Atraxa, Praetors' Voice decks (9,207 on EDHREC). 1 public deck on TCG runs it. It has 8 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 Vishgraz, the Doomhive

Corrupting Influence - Phyrexia: All Will Be One Commander, led by Ixhel, Scion of Atraxa

Commanders that run Vishgraz, the Doomhive most

Deck counts from EDHREC.

Often played with Vishgraz, the Doomhive

Cards that show up in the same decks on EDHREC.

Rulings

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: 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: 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: The bonus Vishgraz receives due to its last ability may cause it to survive combat damage in some cases. For example, if an attacking Vishgraz is blocked by a 3/3 and another creature with toxic 1 is attacking at the same time and is unblocked, Vishgraz with deal 3 damage, receive 3 damage, and get +1/+1 at exactly the same time. The end result is that it will stay alive and be a 4/4 creature with 3 damage marked on it.
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: 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.