Extinct.
Formerly of Veeshan's Peak pre-revamp.
Spawn rate on Guardian Wurms is 15 minutes.
They come in two versions:
1) Do not see invis, small fire AE, melee for 500s. They run when low on health and enrage sometimes. They have a chance to spawn another wurm upon death.
2) Do see invis, 500ish cold AE coupled with dispell, AE Fear. Melee for 500s. Some run, some enrage. It's touch and go.