SpellVerified on build 25605617

Melf's Acid Arrow

Level: Level 2 · Evocation
Cost: Action + 2nd-level spell slot
Range: 18 m
Roll: Ranged spell attack
Damage: 4d4 Acid + 2d4 Acid
On a successful save: Half damage
Components: Verbal, Somatic

Shoot a green arrow that covers the target and the ground with acid. Deals 4d4 Acid damage immediately and 2d4 Acid damage at the end of the target's turn.

Damage by spell slot

Average at 2nd level

4d4 Acid + 2d4 Acid

Average at 6th level

8d4 Acid + 6d4 Acid

Per slot level

each slot above 2nd

2nd-level slot15 4d4 Acid + 2d4 Acid
3rd-level slot20 5d4 Acid + 3d4 Acid
4th-level slot25 6d4 Acid + 4d4 Acid
5th-level slot30 7d4 Acid + 5d4 Acid
6th-level slot35 8d4 Acid + 6d4 Acid

Average damage of one cast at each spell slot, from the game's own upcast entries; a creature that succeeds the save takes half.

Slot	Damage	Average	On a save
2nd	4d4 Acid + 2d4 Acid	15	7.5
3rd	5d4 Acid + 3d4 Acid	20	10
4th	6d4 Acid + 4d4 Acid	25	12.5
5th	7d4 Acid + 5d4 Acid	30	15
6th	8d4 Acid + 6d4 Acid	35	17.5

Chance to hit and damage per cast

Level 3, +3 modifier
Level 5, +4 modifier
Level 12, +5 modifier

Average damage of one cast, misses included (at its 2nd-level slot): d20 + proficiency + spellcasting modifier against the target's AC; a natural 20 is a critical hit and doubles the dice.

Show the numbers

Target AC	Level 3, +3 modifier	Level 5, +4 modifier	Level 12, +5 modifier
10	12.8	14.3	15
11	12	13.5	15
12	11.2	12.8	14.3
13	10.5	12	13.5
14	9.7	11.2	12.8
15	9	10.5	12
16	8.3	9.7	11.2
17	7.5	9	10.5
18	6.8	8.3	9.7
19	6	7.5	9
20	5.3	6.8	8.3
21	4.5	6	7.5
22	3.8	5.3	6.8
23	3	4.5	6
24	2.3	3.8	5.3
25	1.5	3	4.5

Caster	AC 12	AC 15	AC 18	AC 21
Level 3, +3 (attack +5)	70%	55%	40%	25%
Level 5, +4 (attack +7)	80%	65%	50%	35%
Level 12, +5 (attack +9)	90%	75%	60%	45%

Chance to hit per attack roll.

Who can get it

From the game's class, subclass and race progression tables (the level is the class or character level it first becomes available at), feat choices, equipment boosts and scrolls.