Detailed specifics
Overview
When the player has unlocked the skill, the player's flying mount will attack enemies.
Rules
When the player has received a certain amount of damage, the Ikran (the player mount) will lunge from the sky towards the player, screech and attack any enemy NPCs in the vicinity, and then repeat the attack on a cooldown.
This seemingly can only happen if the player has the skills unlocked, and the Ikran is available, and can reach the location. The attack itself is often not deadly, but at least discombobulates the enemy NPCs.