Eight rays of light flash from you in a 60-foot Cone. Each creature in the Cone makes a Dexterity saving throw. For each target, roll 1d8 to determine which color ray affects it, consulting the Prismatic Rays table.
Prismatic Rays
1d8 Ray
1 Red. Failed Save: 12d6 Fire damage.
Successful Save: Half as much damage.
2 Orange. Failed Save: 12d6 Acid damage.
Successful Save: Half as much damage.
3 Yellow. Failed Save: 12d6 Lightning damage.
Successful Save: Half as much damage.
4 Green. Failed Save: 12d6 Poison damage.
Successful Save: Half as much damage.
1d8 Ray
5 Blue. Failed Save: 12d6 Cold damage.
Successful Save: Half as much damage.
6 Indigo. Failed Save: The target has the
Restrained condition and makes a Constitution
saving throw at the end of each of its turns. If it
successfully saves three times, the condition
ends. If it fails three times, it has the Petrified
condition until it is freed by an effect like the
Greater Restoration spell. The successes
and failures needn't be consecutive, keep track
of both until the target collects three of a kind.
1d8 Ray
7 Violet. Failed Save: The target has the Blinded
condition and makes a Wisdom saving throw at
the start of your next turn. On a Successful Save,
the condition ends. On a Failed Save, the
condition ends, and the creature teleports to
another plane of existence (DM's choice).
8 Special. The target is struck by two rays.
Roll twice, rerolling any 8.
A shimmering, multicolored plane of light forms a vertical opaque wall—up to 90 feet long, 30 feet high, and 1 inch thick—centered on a point within range. Alternatively, you shape the wall into a globe up to 30 feet in diameter centered on a point within range. The wall lasts for the duration. If you position the wall in a space occupied by a creature, the spell ends instantly without effect.
The wall sheds Bright Light within 100 feet and Dim Light for an additional 100 feet. You and creatures you designate when you cast the spell can pass through and be near the wall without harm. If another creature that can see the wall moves within 20 feet of it or starts its turn there, the creature must succeed on a Constitution saving throw or have the Blinded condition for 1 minute.
The wall consists of seven layers, each with a different color. When a creature reaches into or passes through the wall, it does so one layer at a time through all the layers. Each layer forces the creature to make a Dexterity saving throw or be affected by that layer's properties as described in the Prismatic Layers table.
The wall, which has AC 10, can be destroyed one layer at a time, in order from red to violet, by means specific to each layer. If a layer is destroyed, it is gone for the duration. Antimagic Field has no effect on the wall, and Dispel Magic can affect only the violet layer.
Prismatic Layers
Order Effects
1 Red. Failed Save: 12d6 Fire damage.
Successful Save: Half as much damage.
Additional Effects: Nonmagical ranged
attacks can't pass through this layer, which is
destroyed if it takes at least 25 Cold damage.
Order Effects
2 Orange. Failed Save: 12d6 Acid damage.
Successful Save: Half as much damage.
Additional Effects: Magical ranged
attacks can't pass through this layer, which
is destroyed by a strong wind (such as the
one created by Gust of Wind).
3 Yellow. Failed Save: 12d6 Lightning
damage. Successful Save: Half as much
damage. Additional Effects: The
layer is destroyed if it takes at least
60 Force damage.
Order Effects
4 Green. Failed Save: 12d6 Poison damage.
Successful Save: Half as much damage.
Additional Effects: A Passwall spell,
or another spell of equal or greater level that
can open a portal on a solid surface,
destroys this layer.
5 Blue. Failed Save: 12d6 Cold damage.
Successful Save: Half as much damage.
Additional Effects: The layer is destroyed
if it takes at least 25 Fire damage.
Order Effects
6 Indigo. Failed Save: The target has the
Restrained condition and makes a
Constitution saving throw at the end of
each of its turns. If it successfully saves
three times, the condition ends. If it fails
three times, it has the Petrified condition
until it is freed by an effect like the
Greater Restoration spell. The successes
and failures needn't be consecutive, keep
track of both until the target collects three
of a kind. Additional Effects: Spells can't
Order Effects
be cast through this layer, which is destroyed
by Bright Light shed by the Daylight spell.
7 Violet. Failed Save: The target has the
Blinded condition and makes a Wisdom
saving throw at the start of your next
turn. On a successful save, the condition
ends. On a failed save, the condition
ends, and the creature teleports to
another plane of existence (DM's choice).
Additional Effects: This layer is destroyed
by Dispel Magic.