There are large and small crickets, each was unique.
These little buggers are the bane and blessing of adventurers. If you find a location with lots of ogone’s, you know there is magic and magical treasure about. However, since the average adventurer has more magic items than the normal area, the flies will hang around the adventurer and their items.
Creepy, Crawley, Buzzing, Digging, Biting, Building, Sticking, Jumping, Clicking, and all the other things these small things do.
"OH MY GOD! LOOK AT THE SIZE OF THAT THING!"
It is whispered at harvest bonfires that sometimes swarms will combine into a monstrously huge pile of Black Leaf Bugs, able to instantly stop anything it comes across. What is left explodes in a shower of maggots.
Dragons, being huge and meaty, are the ideal habitat for countless unpleasant parasites.
These mites fly silently and are small enough to be nearly invisible to the naked eye. If it was not for light, no one would know they were there. These creatures absorb and re-emmit light, turning dim to bright, and bright to blinding.
Ka’tshar are very similar to ants with one exception. They are about 6" long.
A possible answer to what happens to spells when a mage dies. If the spell is strong enough, say and enchantment or other permenant effect, part of the mages spirit may become lodged in the magic. It may be a way for items to gain some kind of intelligence, but a mage who has knowledge of this fact would be very hesitant about enchanting anyone or thing. He might have other plans for his afterlife than counting the change in your bag of holding.
Preists, I think, would have this sort of thing covered.