Corrupted Dragon Spores
Full: Create 6 " Corrupted Spore" creatures around target foe. Foes within their range take 100% longer to cast spells and suffer from -2 Health degeneration. Corrupted Spore creatures die after 30 seconds.
Concise: (30 seconds.) Create 6 corrupted spore creatures around target foe. Foes within their range take twice as long to cast spells and have -2 Health degeneration.
Corrupted Dragon Spores is a monster skill used by the Dragon Kuunavang.
In their range is about the same range as a Necromancer's Well.
Kuunavang is partially immune to any interrupts; it'll often take more than one to stop this skill from casting.
However, even with the bug, the increase in casting still makes it wise to avoid them.
Even though the spell states to only increase the casting rate of spells, all skills take 100% longer to cast.