Toxic Deluge

Mana cost: {2}{B}
Type: Sorcery
Set: Star Trek Commander #277 (rare)
Price: $5.00 USD

As an additional cost to cast this spell, pay X life.
All creatures get -X/-X until end of turn.

Toxic Deluge has 19 printings, first in Commander 2013 (2013). EDHREC ranks it #66 among Commander cards. It appears most in Y'shtola, Night's Blessed decks (23,964 on EDHREC). 6 public decks on TCG run it. It has 2 official rulings.

Legality

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

Public decks that run Toxic Deluge

Doom Prevails - Marvel Super Heroes, led by Doctor Doom, King of Latveria
Eternal Bargain - Commander 2013, led by Oloro, Ageless Ascetic
Food and Fellowship - Tales of Middle-earth Commander, led by Sam, Loyal Attendant
Revenant Recon - Murders at Karlov Manor Commander, led by Mirko, Obsessive Theorist
We Are The Borg - Star Trek Commander, led by The Borg Queen
Witherbloom Pestilence - Secrets of Strixhaven, led by Dina, Essence Brewer

Commanders that run Toxic Deluge most

Deck counts from EDHREC.

Y'shtola, Night's Blessed: 23,964 decks
Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel: 17,697 decks
Frodo, Adventurous Hobbit // Sam, Loyal Attendant: 17,185 decks
Kefka, Court Mage // Kefka, Ruler of Ruin: 14,803 decks
Sauron, the Dark Lord: 13,841 decks
Betor, Ancestor's Voice: 11,126 decks
Oloro, Ageless Ascetic: 10,175 decks
Dina, Essence Brewer: 9,435 decks

Often played with Toxic Deluge

Cards that show up in the same decks on EDHREC.

Rulings

2020-08-07: All creatures on the battlefield when Toxic Deluge resolves are affected. Ones that enter the battlefield or become creatures later in the turn are not.
2020-08-07: If you cast Toxic Deluge without paying its mana cost, you'll still choose a value for X and pay X life. This is because it doesn't have {X} in its mana cost.