- Cathedral of the Deep
- Irithyll of the Boreal Valley
- Anor Londo
- Dropped by Deacons of the Deep.
However, while dealing split damage can be beneficial to the player at times, it should be noted that two defenses will have to be factored in when attacking an enemy. This can, more or less, make a player deal either more damage to the enemy, or less damage.
Deep infusions also remove all scaling effects present on the weapon after infusion, much like a Fire Gem does, which means in order to achieve maximum damage on deep weapons, the player will have to fully-reinforce one.