Wizard's Spellbook

While playing Planechase, rolling the planar die will cause any ability that triggers whenever a player rolls one or more dice to trigger. However, any effect that refers to a numerical result will ignore the rolling of the planar die.

If your result is 10–19, you may pay {1} instead of its mana cost. You cannot pay its regular mana cost or any alternative costs the copy has. You may pay any additional costs and must pay mandatory additional costs.

Some effects may modify the result of a die roll. This may be part of the instruction to roll a die or it may come from other cards. Anything that references the “result” of a die roll is looking for the result after these modifications. Anything that is looking for the “natural result” is looking for the number shown on the face of the die before these modifications.