After about 30 feet, the smaller passage breaks into a startlingly large underwater chamber. Bog enters with light coin held out front, piercing and destroying the darkness and shadows nearby the mouth of the smaller passage. Although it does not illuminate the far side of the massive grotto, they can see small fish scatter and numerous other tiny creatures down on the floor of the chamber scrambling for cover into the rocks and dark-colored coral some 20+ feet below them. The underwater roof of the grotto is solid rock in this area about 5 feet above them.
Lauranna and Emm enter behind Bog and take in the scene as well. All three of them notice that the temperature of the water is slightly warmer here and that it does not taste as salty as it was before or burn their eyes as much. They also think they can hear the echo of water dumping into the grotto somewhere beyond the 60 foot illuminating range of their magical coin. Although the continual light does not shine directly upon the far side, it does reflect and sparkle off what could be air bubbles straight ahead up near the roof of the chamber, say around 75-80 feet away, perhaps being generated by water pouring in from somewhere above?
Actions?
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Time Spent Underwater
Bog: 3 rounds
Emm: 3 rounds
Lauranna: 1 round
Invisibility to Animals spell: duration: 13 minutes (1 turn + 1rd/level) Bog: 8 minutes left, Lauranna: 9 minutes left, Emm: 10 minutes left (represents the order Emm cast the spells in)
Water Breathing spell: duration: 3 hours (18 turns; 6 turns/level) 2 hours 57 minutes left
Potion of Water Breathing: 1 hour (6 turns) + 1-10 minutes (DM's roll!

Lauranna: Holding her breath (1eDSG,p12-book/p13-pdf): 3 minutes left
OOC: ok then gang, let me know if you have any questions or need any further clarifications!

TOD: 8:03am of Day 6 on island (Total time since departed Karagonia: 18 days)
HPs/Status: Bog 28/28 ; Emm 10/10 , Lauranna 9/9
WIH (primary/secondary): Bog – spear/light coin ; Emm – spear ; Lauranna - none/short sword (SC = spell component/spell to cast)
M.O./Location In the underwater northern grotto: Emm , Bogdan , Lauranna