Pearl Stone

A special stone used for stargazing divination, seemingly imbued with mysterious energy.
The number of Pearl Stones consumed during stargazing divination increases with each attempt:
1st time: 1 stone
2nd time: 2 stones
3rd time: 3 stones
4th time: 5 stones
5th time: 7 stones
6th time: 9 stones
7th time: 12 stones
8th time: 15 stones
9th time: 18 stones
10th time: 22 stones
11th time: 26 stones
12th time: 30 stones