Oracle

Instant 

Converge - Creatures your opponents control get -X/-0 until end of turn, where X is the number of colors of mana spent to cast Roilmage's Trick.
Draw a card.

Tournooi-info

Legal in: Vintage, Legacy, Modern, Commander

Officiele rulings

8/25/2015
You can cast Roilmage’s Trick even if your opponents control no creatures. You’ll simply draw a card.

8/25/2015
The maximum number of colors of mana you can spend to cast a spell is five. Colorless is not a color. Note that the cost of a spell with converge may limit how many colors of mana you can spend.

8/25/2015
Unless a spell or ability allows you to, you can’t choose to pay more mana for a spell with a converge ability just to spend more colors of mana. Likewise, if a spell or ability reduces the amount of mana it costs you to cast a spell with converge, you can’t ignore that cost reduction in order to spend more colors of mana.

8/25/2015
If there are any alternative or additional costs to cast a spell with a converge ability, the mana spent to pay those costs will count. For example, if an effect makes sorcery spells cost 1 more to cast, you could pay WUBR to cast Radiant Flames and deal 4 damage to each creature.

8/25/2015
If you cast a spell with converge without spending any mana to cast it (perhaps because an effect allowed you to cast it without paying its mana cost), then the number of colors spent to cast it will be zero.

8/25/2015
If a spell with a converge ability is copied, no mana was spent to cast the copy, so the number of colors of mana spent to cast the spell will be zero. The number of colors spent to cast the original spell is not copied.

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