Whoosh… the current rips through the waters where bioluminescent jellyfish roam the colorful coral canyons. You propel yourself forward, your shimmering turquoise tail a symbol of your long lineage. Though you wish you were on a leisurely exploration, you are not. Legends whispered of a hidden kingdom, guarded by a monstrous half-dragon, half-mermaid. It was said to possess a mystical artifact, the only hope for your ailing father, the King of the Khaleesiya Kingdom.
Sunlight filters through miles of ocean, casting an ethereal glow on the waving kelp forests below. Schools of neon fish dart around you, their scales shimmering like jewels. Gigantic anglerfish, with their cavernous mouths, lurk in the shadows. Razor-sharp coral formations threaten to snag your fins if you aren't careful. A colossal squid, its tentacles thicker than tree trunks, emerges from the abyss, its single lidless eye glaring with predatory intent.
You must battle it to go on… so you pull out your bejeweled sword and let out a loud, underwater roar.
Next up, house rules that DnD players experimented with that totally backfired.