Rain

/spells/spell-cast-acid-rain

History

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Acid school

Rain

Acid arcana

Call down a rain of acid that corrodes enemies in a wide area

Last updated: July 2, 2026

Preview

In-game

At a glance

Stats

School

Acid

Damage type

Acid

Cooldown

120 s

Cast delay

0 s

Unlock level

XP multiplier

×0.75

Spell Progression

XP & Leveling

XP per cast

108

First cast bonus

+200

308 total

Casts per level

≈ 1 000 XP/level

Casts needed to reach school unlock levels

School level	Total XP needed	Casts (from 0)
Level 1	0	0
Level 4	3,000	28
Level 12	11,000	102
Level 20	19,000	176
Level 35this spell	34,000	315

Overview

How it plays

The Acid school's big curtain call. Rain calls down sustained acid across a wide area for its full duration, layering corrosion on everything caught underneath. It's not subtle and it's not fast to recharge, but nothing else in the school covers this much ground continuously.

Strategy

Drop it on objectives, doorways, or boss arenas where you know enemies will be forced to stand still. The sustained damage is most effective when targets can't leave the area. Combine with Contagion beforehand to maximize the debuff overlap.

Strengths

Widest area coverage in the Acid school
Sustained damage over duration rather than one burst
Extremely effective on objective-based encounters

Weaknesses

Longest cooldown in the school
Moving enemies can walk out of the rain area

Cross-school recipes

Combos featuring Rain

Acid Rain Elec Strike
Lightning Strikes
Rain conducts the lightning - chained strikes hit everyone in the rain zone.

Community

Builds running this spell

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Videos

Cross-school combo overview - quick reference for what stacks with what.
By Bull's Guidebook
Watch on YouTube ↗
By Bull's Guidebook
Watch on YouTube ↗