Yahar'gul, Unseen Village corpse.
Sold by Messengers for 26000 Blood Echoes after obtaining the Spark Hunter Badge.
Off physical atk Button 80/160
Off blood atk Button -
Off arcane atk Button -
Off fire atk Button -
Off bolt atk Button 40/80 Attr. Bonus
QS Bullet Use - Strength icon 2 Skill icon 2 Bloodtinge icon 2 Arcane icon 2
Durability icon 100 D/B E - D
Special Att. Attr. Req.
Slow poison ATK Button Rapid poison Button VS Kin Button VS Beasts Button Strength icon 2 Skill icon 2 Bloodtinge icon 2 Arcane icon 2
0 0 100 100 12 8 - -
Weapon Info
Weapon Type Right Hand Weapons
Transform Morning Star,
7 sec. Bolt charge
Imprints Normal (Radial, Radial, Waning)
Notes Strong against the Kin

The Tonitrus is a Trick Weapon in Bloodborne.


In-Game Description

A unique trick weapon contrived by Archibald, the infamous eccentric of the Healing Church workshop.
Striking this peculiar iron morning star flail like a match generates the same blue sparks that blanket a darkbeast.
Unfortunately, for reasons untold, the hunters of Archibald's time did not fully take to the device.



The Tonitrus is, quite simply, one of the most straightforward weapons in Bloodborne.

It is a mace and has a moveset that deals only blunt damage with a small innate amount of Bolt damage as well, however, the weapon lacks any sort of transformation or change in moveset.

Instead, transforming the Tonitrus charges it with electricity for about 7 seconds, adding Bolt ATK. In other words, the transformation of this weapon is a temporary Bolt Paper.

However, this buff is quite interesting as it is NOT a flat damage boost as other buffs.

This buff, instead, adds a static 40 Bolt damage, then adds a 0.40 Arcane scaling, and finally multiplies all Bolt damage by a whopping 70%.

The weapon, however, finds balance in its scaling. It has decent scaling in Strength and bad Arcane scaling, however it is versatile in the sense that players with high Strength can still get decent damage out of it, especially if they find themselves not having time to buff the weapon, whereas having high Arcane turns it into an extremely high Bolt damage weapon.


  • Bolt Paper or Fire Paper cannot be applied to the Tonitrus.
  • Buffing the weapon adds 40 Bolt Damage, 0.40 Arcane scaling, and then multiplies the overall Bolt damage by 1.7 (70%).
  • Quite effective against the Kin.
  • It is recommended to use Nourishing Gems on this weapons in order to raise both damage sources. However, if players have a clear preference on Arcane investment, then going for pure Bolt Damp Gems is the best (players can farm very high radial Bolt damage gems from the Fishing Hamlet Priest, the ones who carry large staves and rain down thunder).


  • Appears to be based around a tesla coil.
  • It is referred to as a "morning star flail" in its description, however, these statements are false, the Tonitrus is clearly a mace. A "morning star" is a spiked mace, whereas a "flail" is a mace but with chain separating the head and the shaft.
  • It does indeed produce the same "blue sparks" as the Darkbeast.


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