From Guild Wars 2 Wiki
Drop a giant ice spike on foes to make them vulnerable.
— In-game description [?]
- Aquamancer's Training - Deal extra damage when your health is above the threshold. Reduces recharge on all water weapon skills.
- Piercing Shards - While attuned to water, your spells deal more damage to vulnerable foes. Vulnerability lasts longer.
- Damage occurs after the vulnerability.
- If cancelled or interrupted, the animation will still play but will have no effect.
- A Guild Wars skill bears the same name as this skill.