Mana Surge Wyrms
Mana Surge Wyrms are a mutated variety of mana wyrm that first appeared on the grounds of Falthrien Academy following the warping and destruction of the academy by Felendren. They feed on magic with an aggressive voraciousness.
Biology
Mana surge wyrms are larger than their normal brethren and possess four sets of eyes, longer tendrils, and a brilliant violet coloration.
Like their smaller kin, mana surge wyrms feed on magical energy, though in their mutation their hunger has grown insatiable and they ultimately place feeding on priority higher than their own safety. As they gorge themselves on mana, they are capable of growing to massive sizes, and any injury dealt to them bleeds volatile mana that can harm would-be attackers.
Upon reaching gargantuan size, the mana surge wyrm's body can no longer contain the magical energy it has consumed, and it bursts in an explosion of arcane energy, the backlash of which can cause a chain reaction with other nearby mana surge wyrms and a deadly environment to any that encounter them.
It appears that the use of the dispel magic spell targeting these creatures can sap its consumed mana, causing larger specimens to reduce in size.
