Malignius Mortifer's Super Ultra Flora Growth Potion

Malignus Mortifer's Super Ultra Flora Growth Potion is a potion mentioned in the Varrock Museum. According to the Museum, the potion is responsible for mutating the giant mole currently living in the tunnels beneath Falador.

According to both the Museum and the news post in which the giant mole was released, Wyson the gardener purchased the potion from Malignus Mortifer, a necromancer currently living near the roads south of Falador. The potion was meant to make the plants in Falador Park sizable enough to resist destruction by the moles living there. However, as a side effect, one of the moles grew hugely in size after eating plants protected by the solution, resulting in its dubbing as the "giant mole."

The mole has since given birth to multiple offspring. Players may fight the giant mole by entering the tunnels through Falador Park. (See: Giant Mole for more details.)

Note: This potion is only theoretical, it is not possible to obtain or make using the Herblore skill.