While fighting some Rock Giants, I'm finding my tremendously large Arcane Orbs (with Celestial Orb) bouncing back at me and my friends, damaging us!
How can I avoid annihilating my friends with magic, and what's causing my orbs to get reflected?
Rock Giants apparently have an ability that puts up a swirly shield that will reflect projectiles away from it, and cause said projectiles to damage you and your party. This is especially dangerous if you have large projectiles and/or lots of friends playing with you.
Anytime you see this swirly garbage, switch to a non-projectile attack (e.g. Disintegrate, Blizzard, Electrocution, etc.).