rolled 6, 2, 4 = 12
Magic-wise, you've focused almost exclusively on the cold aura, compacting it into a cellar-size space and trying to extend the duration. You've found that it can be used offensively, testing it outside on one occasion. It froze every plant within a three-foot radius, once you'd figured out how to visualize a rapid, massive drop in temperature. If nothing else, you can straight-up freeze any animal or human near you, regardless of armor. In the time department, the maximum the aura can maintain is twelve hours, after which it dissipates. Pouring more energy into it only seems to make it colder. If the tablet truly holds near-infinite power, it's doubtful you've hit an absolute limit. It might just require a different approach.
On the fifth night, you decide to venture into one of the tunnels. Despite Lark's warnings, which he got second-hand anyway, there might be something useful in them, like valuable minerals or gems. They might even lead to other towns or caves near them, straight under the crust. With your armor on and your axe handy, you search for ones that have a slighter slope, and find a few, among the 90 or so that branch off down here.
Stepping in, you find the walls to be incredibly smooth, extending in a nearly perfect circle all around. Even with your eyes, you can barely see fifty feet in front of you, so you unfasten the pouch where you keep the tablet, letting its soft blue glow spill out ahead. It seems brighter now, and the whisper louder, but you have plenty of practice ignoring it. The tunnel continues for some distance before branching, with one end moving sharply to the left and downward, while the other two paths curve right, one slightly and the other at a large angle, both remaining level.
Once again, consensus changed when I was almost done with the timeskip. I need better timing.