Blast-Furnace Hellkite

Mana cost: {7}{R}{R}
Type: Creature — Dragon
Power / toughness: 5 / 5
Set: The Brothers' War Commander #12 (rare)
Price: $4.13 USD

Artifact offering (You may cast this spell as though it had flash by sacrificing an artifact and paying the difference in mana costs between this and the sacrificed artifact. Mana cost includes color.)
Flying, double strike
Creatures attacking your opponents have double strike.

Blast-Furnace Hellkite has 4 printings, first in The Brothers' War Commander (2022). EDHREC ranks it #4,266 among Commander cards. It appears most in Kaalia of the Vast decks (7,415 on EDHREC). 1 public deck on TCG runs it. It has 2 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 Blast-Furnace Hellkite

Mishra's Burnished Banner - The Brothers' War Commander, led by Mishra, Eminent One

Commanders that run Blast-Furnace Hellkite most

Deck counts from EDHREC.

Kaalia of the Vast: 7,415 decks
Tannuk, Steadfast Second: 3,797 decks
Magda, Brazen Outlaw: 2,028 decks
Mishra, Eminent One: 1,752 decks
Herigast, Erupting Nullkite: 1,028 decks
Chiss-Goria, Forge Tyrant: 773 decks
Raph & Mikey, Troublemakers: 757 decks
Firkraag, Cunning Instigator: 563 decks

Often played with Blast-Furnace Hellkite

Cards that show up in the same decks on EDHREC.

Rulings

2022-10-14: Blast-Furnace Hellkite’s last ability applies to any creature that is attacking one of your opponents, even if another opponent controls that creature.
2022-10-14: When you cast a spell with offering by sacrificing a permanent, generic mana in the sacrificed permanent’s mana cost reduces only generic mana in the spell’s total cost. Colored and colorless mana in the sacrificed permanent’s mana cost reduces mana of the same type in spell’s total cost, and any excess reduces the spell’s total cost by that much generic mana. The total cost of the spell can’t be reduced to less than {0}.