|Artwork for the Thunder Wool in Mega Man 10|
It allows the user to create a cloud that rises in a arc 7.5 tiles high and 4 tiles forward. This cloud can pass through exposed enemies, and the distance of the arc can be adjusted by holding up or down before firing (2 tiles forward if up is held, and 5.5 tiles if down is held). Once the cloud reaches its apex, a lightning bolt is sent down from it which hits up to six times, pierces through armored enemies, and creates streaks of electricity 2 tiles out on the sides of the ground it strikes. It takes one second for the cloud to reach its apex, and the lightning persists for two seconds. Up to two clouds can be onscreen at a time. Firing it too close to a wall will cause it to be lodged inside of it.
In a change from the original incarnation, Thunder Wool uses 2 units of energy instead of 4, and its damage was decreased from 4 units to 1.5 to compensate for its ability to multi-hit. Since it's an electric-based weapon, it can power up Fuse Crosser/Fuse Xtender and trigger Spring Man's electromagnetism, but cannot affect Fire Met Spawners due to how the weapon functions.
- Thunder Wool was known as the weakest weapon in Mega Man 10, since it had a longer startup time, no horizontal range on its lightning bolts, less energy capacity, and was prone to being canceled entirely if the cloud touched an enemy.
- Despite the previous points, the original Thunder Wool could nullify projectiles that made contact with its thunderbolt, as well as pass through Count Bombs, which the Mega Man Maker version of the weapon cannot do.