Ideias i have for new gems

The world has a lot of water elements, deities, and enemies related to water, and so far the only gem made of this element is the hydrosphere (I'm considering only pure water, no ice).

So, some ideas: Tsunami - we have tornadoes and earthquakes, but we're missing the tsunami. It would probably be the basic way to push enemies away and stun them.

Geyser - it could be like some enemies have those beams of water that come out of the ground, or it could be a jet of water that burns the enemy.

Something from the crabs that could increase damage based on armor or physical resistance (retaliation or a stunner).