The Abyssal Tentacle is a weapon which requires 75 Attack to wield. It is obtained by killing the Kraken boss. It is the strongest one-handed weapon in the game that does not degrade. This being said, it has a high market value.
Although the Abyssal Tentacle has no Special Attack, it has +4 more Slash bonus and +10 more Strength bonus than the Abyssal Whip. It also has +8 more Slash bonus and +7 more Strength bonus than the Lime Whip indeed making it the best one-handed weapon choice (that does not degrade).
Hover over image for type
A player wielding the Abyssal Tentacle.
- ↑ 1/250 Chance