太陽の拳
アーティファクト
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それはすべて私の手の中にある。つまらぬ夢も、壮大な計画も、魂も、恐れもだ。すべては私から生まれ、私の中を抜けていくのだ。 ―― メムナーク
Illustrated by
Fifth Dawn#123RareJapanesePrice unavailable
Legality
Rulings
Dec 1, 2004
Fist of Suns's ability is an alternative cost to cast a spell. You can't combine this with other alternative costs, such as flashback. You can pay additional costs, such as kicker, in addition to this alternative cost.
Dec 1, 2004
If you apply Fist of Suns's alternative cost to a spell with 
in its mana cost, X is 0.
Dec 1, 2004
If you cast a spell for which mana of any color can be spent to cast it, you may cast it for Fist of Suns's alternative cost and still spend any color of mana to cover that cost.
Feb 1, 2014
If you pay rather than pay the mana cost of a spell with in its mana cost, the only legal choice for X is 0.