Dive is a skill located in the Animal Companions (which can be found in the Warden skill tree). Dive is a base skill, and can be morphed into Cutting Dive
or Screaming Cliff Racer
Dive deals the following types of damage: Magic Damage. Which means that it gets buffed by the following blue champion point trees: Elemental Expert, Elf Born, Master at Arms, Spell Erosion. Also the following red champion point trees protect against this skill: Elemental Defender, Iron Clad.