DM Screen is a free web app that helps Dungeon Masters run Dungeons & Dragons 5th Edition games. It combines an initiative and combat tracker, an encounter builder, a party manager, and searchable references for spells, magic items, and shop prices in a single browser tab.

Is DM Screen free, and do I need an account?

Yes, DM Screen is completely free with no ads and no account required. Your party, encounters, and notes are saved locally in your browser.

Which edition of Dungeons & Dragons does it support?

DM Screen supports Dungeons & Dragons 5th Edition (5e), including spells, magic items, and Monster Manual stat blocks.

Can I run combat and track initiative with it?

Yes. You can build an encounter from your party and any monsters, roll or set initiative, and run combat with live HP, conditions, concentration, and legendary action tracking.

A command palette, NPC name generator, loot generator, dice rolling, and more.

Prismatic Spray

7th-level evocation · D&D 5e (SRD)

2024 rules (SRD 5.2.1)

Casting Time: 1 action

Range: Self

Components: V, S

Duration: Instantaneous

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 to determine which color ray affects it, consulting the Prismatic Rays table.

Prismatic Rays

	Ray
1	Red. Failed Save: Fire damage. Successful Save: Half as much damage.
2	Orange. Failed Save: Acid damage. Successful Save: Half as much damage.
3	Yellow. Failed Save: Lightning damage. Successful Save: Half as much damage.
4	Green. Failed Save: Poison damage. Successful Save: Half as much damage.
5	Blue. Failed Save: 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.
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 (GM's choice).
8	Special. The target is struck by two rays. Roll twice, rerolling any 8.

2014 rules (SRD 5.1)

Casting Time: 1 action

Range: Self (60-foot cone)

Components: V, S

Duration: Instantaneous

Eight multicolored rays of light flash from your hand. Each ray is a different color and has a different power and purpose. Each creature in a 60-foot cone must make a Dexterity saving throw. For each target, roll a to determine which color ray affects it.

1-Red

The target takes fire damage on a failed save, or half as much damage on a successful one.

2-Orange

The target takes acid damage on a failed save, or half as much damage on a successful one.

3-Yellow

The target takes lightning damage on a failed save, or half as much damage on a successful one.

4-Green

The target takes poison damage on a failed save, or half as much damage on a successful one.

5-Blue

The target takes cold damage on a failed save, or half as much damage on a successful one.

6-Indigo

On a failed save, the target is . It must then make a Constitution saving throw at the end of each of its turns. If it successfully saves three times, the spell ends. If it fails its save three times, it permanently turns to stone and is subjected to the condition. The successes and failures don't need to be consecutive, keep track of both until the target collects three of a kind.

7-Violet

On a failed save, the target is . It must then make a Wisdom saving throw at the start of your next turn. A successful save ends the blindness. If it fails that save, the creature is transported to another plane of existence of the DM's choosing and is no longer . (Typically, a creature that is on a plane that isn't its home plane is banished home, while other creatures are usually cast into the Astral or Ethereal planes.)

8-Special

The target is struck by two rays. Roll twice more, rerolling any 8.