The Ancient Treesword is one of many weapons that can be acquired in the Frontier. The Ancient Treesword can be bought from the Otherworldly Weaponsmith in The Town of Right and Wrong at a price of 2,100,000 gold.
In appearance, the main blade appears to be pastel-blue with several smaller outcroppings; may be inspired by the roots and branches of a tree. The guard and pommel appear to be made out of several bronze plates, whilst the grip is constructed of stone.
When equipped, its normal attack will spend about 3 stamina points per swing. Each of its swings will last about 2 seconds before the player can swing again. Like most greatswords, it is sluggish and will slow the player down while they are swinging the weapon. These traits make it challenging to quickly eliminate enemies as well as aggressively attacking can diminish the user's stamina.
The special ability of the Ancient Treesword is titled 'Greater Uppercut', which, upon activation, will result in the wielder swinging back from their right side, then swing it upwards to perform the uppercut; supposedly coming from the sheer weight of the sword. If the user times a jump correctly with the special ability, they may jump even higher than normal. The special ability's cooldown lasts for 8 seconds before it can be used again.
- While equipped, the Ancient Treesword will emit cloud-like particles.
- For a rough idea of the Ancient Treesword's weight, a small green ash tree can weigh as much as 250 pounds.
- During the Balance Update [v1.31], the Ancient Treesword's base damage was increased from 365 to 455 points.