Defeating him gives you The Rite of Kindling which can give you 5 more estru flask at any bonfire, the limit being 20.
Not much is known about Pinwheel, but there are some clues about its nature and goals. This being is seemingly composed of three separated consciousnesses; after noticing the Chosen Undead, the three masks look at each other and twitch lightly as if discussing what to do with the intruder. Its body looks swollen and has three pairs of "arms", hinting that it's composed of three bodies or skeletons fused together. Judging by the amount of tomes and skeletons (all shackled to the ceiling and one on its operating table) inside its lair, we can assume that it isn't hollow and it is doing some kind of necromantic research.
To find Paladin Leeroy you need to jump down on a ledge.
Pinwheel is a very frail boss, with the fourth lowest hit points of any boss in the game, only beaten by the Asylum Demon, the Taurus Demon and the Capra Demon. However, he can quickly become dangerous as he can summon an unlimited number of clones, all of whom deal the same amount of damage as he does. Therefore, a good strategy for fighting Pinwheel is to rush at him right when the fight starts and do as much damage as possible. When he teleports after summoning his clones, it's still possible to land some hits on him before he disappears. A simple tactic to identify the clones from the real Pinwheel is to lock on to him when possible.
There is a bondfire close by if you jump down certain ledges.
His six arms will glow and spin before firing it. This is easy to dodge with the right timing.
Slower, larger fireball that does more damage and has a bigger hitbox, though it takes Pinwheel longer to charge. Note that Pinwheel can also use this while jumping at a downward angle.
A close range melee attack that does big damage. Pinwheel will telegraph this by moving in close and begin spinning and igniting his arms.
Extremely powerful mid-range attack. There is a long delay before this attack is executed. Blocking it is unwise, as it hits multiple times, breaking the player's guard, and potentially dealing a fair bit of damage.
Pinwheel will spin in the air and give off a purple light before conjuring an identical clone of himself. The clones are exactly the same as Pinwheel and there's no easy way to distinguish one from the other without keeping track of the original. The clone can also use all of Pinwheel's attacks but will disappear instantly when hit. There is no known limit to how many clones Pinwheel can spawn.
When the real Pinwheel is approached he may attempt to flee by disappearing, leaving the player at the mercy of his clones. A short time later he will reappear in a fashion similar to the spawning of the clones.
|Physical Defenses||Elemental Defenses||Resistances|
These stats are sourced from FuturePress's Official Dark Souls Strategy Guide.
Rite of Kindling
Mask of the Child
Mask of the Father
Mask of the Mother
*One of the masks will always drop
- ↑ Technically, Pinwheel is optional since it is possible to bypass him through a glitch. However, since glitching is not accepted as canon, Pinwheel is designated as a required boss.