"Willem put it on and started shooting sparks from his hands like some kind of wizard! Was supposed to be my turn next, but the blasted thing won't come off his hand. Send help."
—Brazen Coalition expedition dispatch

„Willem steckte seine Hand hinein und fing an, wie ein Zauberer Funken daraus zu verschießen! Eigentlich sollte ich als Nächster an der Reihe sein, aber das verdammte Ding will ihm nicht von der Hand gehen. Schickt Hilfe."
—Expedition der Tollkühnen Koalition

Handschrift der Sonnen

Du kannst {W}{U}{B}{R}{G} bezahlen, anstatt die Manakosten von Zaubersprüchen, die du wirkst, zu bezahlen.

"¡Willem se lo puso y empezó a disparar chispas con las manos, como si fuese un hechicero! Supuestamente después me tocaba a mí, pero no somos capaces de sacarle esa cosa de la mano. Necesitamos ayuda".
—Enviado a una expedición de la Coalición Azófar

Puño de los soles

Puedes pagar {W}{U}{B}{R}{G} en lugar de pagar el coste de maná de los hechizos que lances.

« Willem l'a mise et ses mains ont commencé à cracher des étincelles. On aurait dit un genre de sorcier ! J'étais le prochain sur la liste, mais il n'arrive pas à retirer cette satanée chose de sa main. Envoyez de l'aide. »
—Message de l'expédition de la Coalition des hardis

Poigne des soleils

Vous pouvez payer {W}{U}{B}{R}{G} à la place du coût de mana des sorts que vous lancez.

"Willem l'ha indossato e ha iniziato a lanciare raggi di luce dalle mani come una specie di mago! Poi doveva toccare a me, ma quel dannato aggeggio non si sfila più. Inviate soccorsi."
—Comunicazione dell'Alleanza di Bronzo

Pugno dei Soli

Puoi pagare {W}{U}{B}{R}{G} invece di pagare il costo di mana per le magie che lanci.

「ウィレムがそれを身に着けた途端、指先から魔法みたいに火花を散らし始めたんだ！次は俺の番だったんだが、あいつの手から外れなくなっちまった。助けをよこしてくれ。」
――鉄面連合の調査派遣兵

太陽の拳

あなたは、あなたが唱える呪文のマナ・コストを支払うのではなく、{W}{U}{B}{R}{G}を支払ってもよい。

"Assim que Willem a colocou, suas mãos começaram a disparar raios, como se fosse um mago! Em seguida seria a minha vez, mas a maldita coisa não saía da mão dele. Em seguida seria a minha vez, mas a maldita coisa não saía da mão dele. Mandem ajuda."
— Despacho de expedição da Coalizão Brônzea

Punho dos Sóis

Você pode pagar {W}{U}{B}{R}{G} em vez de pagar o custo de mana das mágicas que conjura.

「威廉戴上手套后，就见指尖不断射出火花，像法师一样！原本接下来该到我，但这该死的东西摘不下来了。速速来援。」
～莽霸联盟探险队急讯

五阳护手

你可以支付{W}{U}{B}{R}{G}，而不支付你施放之咒语的法术力费用。

Fist of Suns

You may pay {W}{U}{B}{R}{G} rather than pay the mana cost for spells you cast.

The Lost Caverns of Ixalan Commander

"It is all in my grasp. Every petty dream, every grand scheme, every soul, every fear. It all flows through me and from me."
—Memnarch

The List

Commander 2017

You may pay {W}{U}{B}{R}{G} rather than pay the mana cost for spells that you cast.

Fifth Dawn

You may pay {W}{U}{B}{R}{G} rather than pay the mana cost for spells that you play.

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.

If you apply Fist of Suns's alternative cost to a spell with {X} in its mana cost, X is 0.

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.

If you pay {W}{U}{B}{R}{G} rather than pay the mana cost of a spell with {X} in its mana cost, the only legal choice for X is 0.