MEGARIS | Battle Cave
Riddle Name: Happy Hour
"It's dangerous outside, so I'm waiting out the war. The only time I go outside this cave is to replenish my cup. Once I leave, I travel northwest from the battlefield in the Occupied Forest of Tripodiskos. Find me at the altar of offerings at the feet of the wine god himself."
It's after the dive, when you dive up at the dead end, you follow the path in this next section of the cave. At the crossing turn left. Here's Loot Treasure and further up the Ainigmata.