Blast-Furnace Hellkite is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.
Official card text
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.
Complete guide
Blast-Furnace Hellkite is a massive Dragon that brings devastation to any battlefield, turning every combat into a lethal display of power. By utilizing its Artifact offering ability, you can surprise your enemies by dropping this powerhouse at instant speed. Not only is it a double-striking threat on its own, but it also grants double strike to any creature attacking your opponents.
Understanding Artifact Offering
Artifact offering is a unique keyword that allows you to cast Blast-Furnace Hellkite as though it had flash. To do this, you sacrifice an artifact as you cast the spell. The mana cost of the sacrificed artifact is subtracted from the Hellkite's cost. Generic mana reduces generic mana, while colored mana reduces mana of the same type; any excess colored mana from the sacrifice further reduces the generic mana cost. You still pay the remaining difference, but you can never reduce the total cost to less than zero.
Double Strike for Everyone
The Hellkite's final ability is particularly potent in multiplayer games. It states that creatures attacking your opponents have double strike. This means if Opponent A attacks Opponent B, Opponent A's creatures will gain double strike from your Hellkite. This ability does not care who controls the attacking creatures, only that they are attacking someone other than you.
Step-by-Step Resolution
When you cast the Hellkite using offering, you first announce the spell and choose to use the offering ability. You then sacrifice the chosen artifact. The game calculates the new cost by subtracting the sacrificed item's cost from the Hellkite's {7}{R}{R}. Once the remaining mana is paid, the spell is cast and put onto the stack. When the Hellkite enters the battlefield, its continuous effect immediately applies to all eligible attacking creatures.
Common Pitfalls
Remember that offering only allows you to cast the spell as if it had flash; it does not change the fact that you are casting a spell, so it can still be countered. Additionally, the cost reduction includes color. If you sacrifice an artifact that costs {U}, it will not reduce the {R}{R} requirement of the Hellkite, only the generic {7} portion of the cost.
Interaction examples
If you control Summon: Bahamut, which is an enchantment creature artifact, you can sacrifice it to cast Blast-Furnace Hellkite. Since Summon: Bahamut has a mana value of 6, you only need to pay {3} extra mana to bring the Hellkite onto the battlefield at instant speed during an opponent's combat phase.
If you attack an opponent with Kozilek, Butcher of Truth while Blast-Furnace Hellkite is on the battlefield, Kozilek gains double strike. Kozilek will deal 10 damage during the first-strike combat damage step and another 10 damage during the normal combat damage step, likely ending the game on the spot.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Blast-Furnace Hellkite
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
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
.
No other card is named in this ruling.
- #2· Wizards of the Coast
Blast-Furnace Hellkite’s last ability applies to any creature that is attacking one of your opponents, even if another opponent controls that creature.
No other card is named in this ruling.
Legal formats
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Meta decks with Blast-Furnace Hellkite
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Summon: Bahamut
Kozilek, Butcher of Truth