Trigonometry, my greatest nemesis! Actually, I do that with post-it notes. Random scrawl that is difficult to interpret afterwards, not trigonometry. I'm not entirely sure that a combo meter would be necessary (but I don't know what you had envisioned) but a stopwatch object to slow down time would be nifty. Maybe it could be a synthesisable item so you could use it whenever you want, but the use of one consuming the watch and with requirements just steep enough that you wouldn't have too many of them?
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Actually, I do that with post-it notes. Random scrawl that is difficult to interpret afterwards, not trigonometry.
I'm not entirely sure that a combo meter would be necessary (but I don't know what you had envisioned) but a stopwatch object to slow down time would be nifty. Maybe it could be a synthesisable item so you could use it whenever you want, but the use of one consuming the watch and with requirements just steep enough that you wouldn't have too many of them?