I would suggest that you create a strengthening token.

I suggest this as a way to slightly increase the number of strengthenings you can perform, but without having to dump a whole lot of extra coins into the game

This is because, strengthening at higher levels becomes a very tedius process, that even for a dedicated player, could take several days to upgrade just 1 or 2 equipment/weapons

This token would instantly increase the strengthening level of a weapon/eqipment by 1 level

1 Token would be given per day

1 Token could be earned per day through a single daily event, timed

The timed daily event, would be called "Forging strength" it would be a time limited word scramble puzzle.

The word scramble puzzle would be word, or phrase, related to the show.

The time limit would depend on the length of the scrambled word or phrase