You look at the body of water and, approaching, splash it a little. Yep, it's water. "Zas, um... mind stepping out for a bit, to stand guard?"
"As you wish." the Phantom replies, floating up the stairway.
You almost bolt into the pool, removing your poncho and cleaning the slime from there... and just about everywhere else you can, washing yourself. You sigh out, pulling your head from the water. "That's better~"
"You sure it's safe in there, Termina?" Lynna questions, approaching nervously.
You move to the side of the pool. "It's not connected to any waterway, and it would be a fairly odd place for the poison to be. The shallow area in the other room was free of it, too. I believe it's safe." You pull yourself out of the pool, throwing your Poncho down to let it dry, and opening the chest on the other side of the room. Inside is...
youtube.com/watch?v=Ppy8d8_iEQo
...the [Temple Map]! All right, now you're set!
You head back in to make sure your clothes are properly cleaned. "...say, Lynna, you sure you don't want to take a dip in too? It's not too cold." you state, giving a playful splash.
"Ah, tempting..." she responds, seriously considering it. "...tell you what, we make it out of here and get this mess all fixed up, we head to the beach near my home. I can even lend you some spare swimwear!" she tells you with a laugh. "...tops might be a bit big for you, but I'm sure you can manage."
You give her a bit of a defensive glare and mumble out a "Hey!"
>A. Ah sure, beach sounds nice
>B. Ah, I wish I could, but I still have another dungeon to get through...
>C. Head out after you've got things dried off enough, go to the other pool room and see if there's anything out there
>D. Move on to the western room you haven't been to, past the main hall
>E. Something else?