Spell modifiers that cause projectiles to afflict targets with a long-lasting debuff.
A spell modifier that causes its projectile to "infect" a creature with the Personal Lightning Caster effect, making strike out with Lightning Bolts in random directions until it dies. If the projectile can strike the player, either by enemy wand use or friendly-fire projectiles, it will affect you as well.
This effect can attach itself to pickups like the Max health upgrade hearts, or HP/spell restores inside the Holy Mountain. Also sometimes to explosive crates. It will disappear when the items are picked up or crates destroyed.