Complex sentence: Olhydra is an archomental in the "Dungeons & Dragons" fantasy role-playing game that appears as an endlessly breaking wave of water, an amorphous blob with almost-human features buried within its depths.
Split into simpler sentences: Olhydra is an archomental in the "Dungeons & Dragons" fantasy role-playing game. Olhydra appears as an endlessly breaking wave of water, an amorphous blob with almost-human features buried within its depths.