Unfortunately, Water has even less spells castable underwater than Air:
Water-based Evocations:
Cold Bolt/Blast -no
Slime -no
Rain -no
Water Strike -yes
Falling Frost -no
Ice Strike -no
Niefel Flames -no
Murdering Winter -yes (castable, but not targettable)
Total: 1 castable combat spell. Of the Water/Fire combination, only Geyser works underwater.
Air-based Evocations:
Lightning bolt -yes
Shock Wave -yes
Mist -no
Thunder Strike -yes
Orb Lightning -yes
Storm -no
Wrathful Skies -no
Shimmering Field -yes
total: Mist is negated, but archers can't be used underwater. Besides that, Air only loses Storm and Wrathful Skies; all 5 other Air evocations can be cast underwater.
Water/Air Freezing Mist can't be cast underwater. And I forgot Globals, it seems. On combat boosts, Water gets Water Shield (+5? def), but neither loses anything. Even Mistform works underwater.
Googling define
oseidon yielded an interesting idea:
"God of the sea
and earthquakes. Horses and bulls are sacred to him. Originally the god of earth tremors, of vegetation and fecundity, Poseidon fought for the Olympians against the Titans, and his reward after the victory was dominion over the seas, lakes and rivers. Poseidon's fits of rage manifest as storms"
Water-Earth, anyone? Besides Water, only earth, mud and rocks are easily found under water. And Death, for some.
Mechanical Men, Iron Dragons and Enlivened Statues can go underwater, even though MMs have to be constructed on land. Earth and Water/Earth Evocations don't work underwater, but all the boosts do.
It would also make Shrouds of the Saint an interesting option for both Atlantis and R'lyeh. 50% Quickness, reinvigoration 5 and natural prot +5 (maybe +9 with +5 armour of Shroud?) for no extra encumberance seems like a good deal for mages. And the fun I would have with Enchantment-driven Claymen - Enlivened Statues fest with W9E9... I considered modding a Head of Clay pretender god just to try out crazy Pythium blessing goodness.
