A spider that charms any enemy in its aura for 30 seconds or so. then has a 50% chance to kill them or let them turn back.

a spider/fly that permanently charms an enemy it is attached to untill it the charmed mob dies, then it moves on to another enemy.

so you always have a charmed minion that changes..

there used to be another mod that did this but its ancient and broke. but had a cute pink fly with a bow that landed on the enemy.

something simular would be amazing.

a suicide bomber spider? once per room it will walk up to the enemy with the most health and blow itself up?

or just have it so it doesnt die and sets of an explosion at its current location on a timer(that doesnt damage the player preferably)

perhaps spiders based on items that already exist could be cool, like maybe a spider version of the rainbow prism could be cool. or a spider that works like gb bug changing the enemies it hits, or a spider that changes coins or hearts into the opposite. let me know if you like my ideas and want more.