Prismatic Ending

You can choose any value for X. Choosing a higher value for X lets you pay more mana and thus spend more colors of mana to cast it. For example, if you choose 0 for the value of X and pay to cast Prismatic Ending, you can exile a nonland permanent with mana value 0 or 1. If you choose 4 for the value of X and pay , you can exile a nonland permanent with mana value 5 or less.

2021-06-18

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.

2021-06-18

The mana value is not a targeting condition. It is checked only as the spell resolves.

2021-06-18

If there are any alternative or additional costs to cast a spell with a converge ability, the colors of mana spent to pay those costs will count.

2021-06-18