Mighty slayer helmet

The mighty slayer helmet is a level 70 helm and the third and final tier of the upgraded full slayer helmet, obtained by upgrading a strong slayer helmet, using 600 Slayer reward points. After upgrading once, the price is decreased to 60 points for each upgrade. While retaining its boosts during slayer tasks, the mighty slayer helmet offers increased defence. Once purchased, the user has a 14% accuracy and damage boost in all combat styles while killing their assigned Slayer monster. Its defence bonus is identical to the Barrows helmets. The helm can hold 30 ferocious ring charges and 40 ring of slaying charges after purchasing the ability to attach them to the slayer helmets. Fused slayer helmets benefit from the ferocious ring damage boost.

The helmet is upgraded for a price, but you must pay if you want to upgrade again; therefore, if you disassemble the helmet, you must spend more points in order to upgrade it again, so it is not suggested to disassemble it. However, if lost it costs significantly less slayer points to re-obtain it. It takes a total of 1,100 slayer points to upgrade from the full slayer helmet.

Comparison with other helmets
The mighty slayer helmet, even without the bonuses from fighting the assigned Slayer monster, is statistically one of the best helmets in the game to use. It holds the record of the highest "All" class helm in regards to defence, providing tier 70 protection from all styles. This makes it very useful when having to face all three styles at once, potentially rivaling the usefulness of higher-tiered helmets such as the superior death lotus hood or tectonic mask. In addition, the mighty slayer helmet does not degrade and is generally easier to obtain.