Clap of Thunder is a Demon Unique staff with no boss attached: it drops anywhere in Hell, most often from H8 up (rarer below that home difficulty, never above it), and nowhere else. Every copy is item level 110, and there 0.2% of what falls comes up Unique. It is built on Perfect Stormlens Staff — step 6 of the Stormlens Staff line, item level 80 and up.

It always rolls the same numbers: +132 Power, +11% Critical Chance, +114 Power, +14% Storm Damage, +9% Cooldown Recovery, +42% Spell Damage, +12% Power, +42% Storm Damage and +42% Shock Effect.

One Unique drop in 40 is a Mythical copy: the same item carrying 15–25% Mythical Energy that boosts every stat on it and can never be changed; the 15% floor is 10 times as common as the perfect 25%.

On top of that it carries Clap of Thunder — Overload is a thunderclap: 50% wider, shoves 2 units and applies Shock, but recharges 25% slower.

It leans into Shock.

Wearing it hands you Aether Beam and Overload.

“You will hear it before you see it. You will not see it.”