Beside from the Four sacred beasts there are Three more Creatures on a similar level of strength as them commonly seen as disasters.
The first Disaster are the Blood Bats these originated from a race of Sap sucking bats but one of them managed to suck some sap from the Genetic tree and under the influence of the Genes it had absorbed it managed to mutate into what now know as a blood bat it gained the ability to turn other Sap sucking bats into blood bats as well. They originally fed off of the genetic tree's sap but after being driven out by the Arrow Falcons they turned to sucking the blood of living creatures as an alternative. Due to the random Gene's they had absorbed they also have a bunch of flaws one such flaw is they completely zero resistance to the suns rays and and world trees Sun flowers. They are intelligent but inherently Chaotic.
The second disaster are the tunneling Worms they can grow to huge size and cause destruction to any environment or ecosystem. They were originally just ordinary earth worms but this species lived near the genetic tree once and under many influences including eating a couple of their smaller roots they mutated into the tunneling worms and unlike the blood bats these worms have no intelligence. Due to their destructive abilities they were driven out by the Earth Moles who's size was no less then theirs and whose claws could tear them to peices. The Moles drove them to a relatively more desolate area small in size at the western corner of the continent that area slowly turned into a desert overtime any worm leaving that area is farther killed by the Earth Moles or any Intelligent races that come across it.
The Third Disaster is the Night Stalker Badger which is the greatest predator on the first Continent their are intelligent have a bloodthirsty personality often killing for the fun of it. They don't posses any abilities that can destroy ecosystems just by being their or where they mutated by the influence of the genetic tree their a natural race. They hunted and killed everything they could find for the love of the hunt and killing driving a couple races to near extinction and leaving a trail of corpses that were left to rot. Due to this they were hunted down by the Armored War Beasts till they were nearly extinct driving what's left into hiding.