When mixed with lava spice, the sap of the colossus tree forms a potion which can cause a being to grow up to twice its size. This potion was used in the fight against the cave troll in the Caves of Kailasa, but was accidentally fed to the troll, causing it to grow and, subsequentally, the cave to collapse ontop of the troll, killing it.

It is unknown exactly what other properties colossus tree sap posesses.