Wasp swarm is a second-level nature magic spell that costs three spell points and summons a cloud of wasps that distract the enemy target for one round. It has no influence on undead or mechanical creatures.
It was like a black cloud, a buzzing and stinging cloud! I ran. If not for that pool, I don't know what I would've done.
Identical in effect to Confusion save that it will work on Elementals as it is not a Mind Spell. Useful to neutralise a powerful enemy stack, particularly if it is a ranged attacker on top of a castle tower, you just need to work out if side-lining your hero is worth taking out the target stack.