I’m in the process of making up spell, magic item and ability cards for my kids to use in our game. I’ve noticed that there are a lot of things getting forgotten about because they are just a line on a character sheet. During this process, I found a new item that I got out of the Fantasy Hero game version of Keep on the Borderlands that one of the characters have that I don’t have a 5e write up for. Lylas the elven rouge in my Age of Worms group has.
You can only summon the insect swarm once per full moon.