Engendro de fundición

Ofrenda de artefacto. (Puedes lanzar este hechizo como si tuviera la habilidad de destello si sacrificas un artefacto y pagas la diferencia entre el coste de maná de esta carta y el del artefacto sacrificado. El coste de maná incluye el color.)
Vuela, daña dos veces.
Las criaturas que atacan a tus oponentes tienen la habilidad de dañar dos veces.

Hochofen-Höllendrache

Artefakt-Opfer (Du kannst diesen Zauberspruch wirken, als ob er Aufblitzen hätte, indem du ein Artefakt opferst und die Manakosten-Differenz zum geopferten Artefakt bezahlst. Manakosten schließen die Farben mit ein.)
Fliegend, Doppelschlag
Kreaturen haben Doppelschlag, solange sie deine Gegner angreifen.

Escouflenfer du fourneau

Offrande d'artefact (Vous pouvez lancer ce sort comme s'il avait le flash en sacrifiant un artefact et en payant la différence de coût de mana entre cette carte et l'artefact sacrifié. Le coût de mana inclut la couleur.)
Vol, double initiative
Les créatures attaquant vos adversaires ont la double initiative.

Nibbio Infernale della Fornace Esplosiva

Obolo dell'artefatto (Puoi lanciare questa magia come se avesse lampo, sacrificando un artefatto e pagando la differenza del costo di mana tra questa magia e l'artefatto sacrificato. Il costo di mana comprende i colori.)
Volare, doppio attacco
Le creature che attaccano i tuoi avversari hanno doppio attacco.

爆発炉のヘルカイト

献身（アーティファクト）（あなたはこの呪文を、アーティファクト１つを生け贄に捧げ、これとその生け贄に捧げたアーティファクトのマナ・コストの差を支払うことで、瞬速を持つかのように唱えてもよい。マナ・コストは色を含む。）
飛行、二段攻撃
対戦相手を攻撃しているすべてのクリーチャーは二段攻撃を持つ。

Blast-Furnace Hellkite

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.

Magic Online Promos

The Brothers' War Commander

Artifact offering (You may cast this spell as thought 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.

Artifact offering
Flying, double strike
Creatures attacking your opponents have double strike.

Blast-Furnace Hellkite’s last ability applies to any creature that is attacking one of your opponents, even if another opponent controls that creature.

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}.