Revenge Reflection
Revenge Reflection is a perk that causes the user to shoot out the last projectile they touched upon taking damage, with it's projectile damage tripled.
The projectile doesn't have to be an enemy projectile as any projectile can be copied, including player projectiles such as Black Hole and Circle of Vigour.
Tips
Due to the speed at which revenge projectiles are fired out, one strategy is to let yourself copy a black hole, before intentionally setting yourself on fire to rapidly eject black holes in all directions, clearing vast amounts of terrain.
Revenge Reflection can be healed to fully heal your character with a single healing bolt when used in combination with a Heijastava Outo, when you shoot a healing bolt at the Heijastava Outo, it will reflect the healing bolt back towards you, which you will then reflect back towards the Outo for an endless ping-pong of healing bolts.
The damage boost from Revenge Reflection scales off of a projectiles current damage, not it's a original damage. This means as long as you can survive the projectile damage of a projectile, you could repeatedly hit yourself with it to copy a projectile repeatedly, tripling it's damage each time. Using this method you could theoretically shoot out a projectile capable of millions of damage every time you're hurt, until another projectile overrides it.
Revenge Reflection makes some spells, such as Giga Blackhole, very dangerous to be in proximity of. This is because upon taking damage from the Giga Blackhole, another one will be spawned ontop of you, which will cause another one to spawn. This will repeat forever until you stop taking damage.