Roilmage's Trick

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.

2015-08-25

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 more to cast, you could pay to cast Radiant Flames and deal 4 damage to each creature.

2015-08-25

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

2015-08-25

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.

2015-08-25