Here’s what I came up with so far, suggestions are appreciated as always.
Spell-Like Abilities: At will – bestow curse (DC X), chain lightning (DC X), charm monster (DC X), cure critical wounds (DC X), deeper darkness, fire storm (DC X), greater dispel magic, hold monster (DC X), invisibility, invisibility purge, levitate, persistent image (DC X), polymorph (humanoid forms only, duration 1 hour), protection from energy, read magic, unholy blight (DC X); 3/day – etherealness, freedom of movement, greater teleport, summon nature’s ally IX, word of chaos (DC X); 1/day – Bigby’s crushing hand (DC X), gate, maze, meteor swarm (DC X), plane shift, wind walk. Caster level 25th. The save DCs are Charisma-based.
I’m considering adding the following spell-like powers – any other suggestions?:
bull's strength, control weather, fox's cunning, horrid wilting, mind fog, mirage arcana, whispering wind
Spells: Oceanus can cast divine spells as a 10th-level cleric. Oceanus has access to the following domains: (Air, Chaos, Evil, and Water?). He also casts spells as a 10th-level druid. The save DCs are Wisdom-based.
Typical Cleric Spells Prepared (6/8/7/6/6/5; save DC 19 + spell level);
0 – create water, detect poison, inflict minor wounds, mending, read magic, resistance;
1st – cause fear, curse water, doom, endure elements, obscuring mist*, protection from good, protection from law;
2nd – desecrate, eagle’s splendor, enthrall, fog cloud*, owl’s wisdom, shatter, silence;
3rd – gaseous form*, inflict serious wounds, magic circle against good, magic circle against law, water breathing, water walk;
4th – air walk, chaos hammer*, control water, dismissal, divine power, sending;
5th – control winds*, dispel good, dispel law, greater command, summon monster V.
*Domain spell. Domains: Air and Water?.
Typical Druid Spells Prepared (6/7/6/5/5/4; save DC 19 + spell level);
0 – create water, detect magic, flare, guidance, know direction, purify food and drink;
1st – charm animal, detect animals or plants, entangle, longstrider, magic fang, speak with animals, summon nature's ally I;
2nd – bear's endurance, bull's strength, cat's grace, chill metal, fog cloud, gust of wind;
3rd – call lightning, plant growth, quench, sleet storm, wind wall;
4th – control water, dispel magic, freedom of movement, ice storm, scrying, summon nature’s ally IV;
5th – baleful polymorph, call lightning storm, commune with nature, summon nature's ally V.