Spell modifiers that adjust the damage of the affected projectiles.
Bloodlust is a spell modifier that greatly boosts the amount of damage a projectile can cause, but also makes it friendly-fire enabled (if it wasn't so already).
While being slightly less powerful than Heavy Shot, it doesn't come with any speed reductions at all. This means it's more useful for wands without any triggers to deliver the payload. In fact, using a trigger with this modifier can be very risky as the spells may fire off in your direction on impact.
For example, a bloodlusted spark bolt is perfectly safe if fired directly from the wand.