Add predicted rate for custom gacha
By default we pick the predicted rate for the gacha from the most similar event. Note that it can be wrong!
For example, 328 and 355 are both wrong. Predicted with legends but both don't have them.
By default we pick the predicted rate for the gacha from the most similar event. Note that it can be wrong!
For example, 328 and 355 are both wrong. Predicted with legends but both don't have them.