Return function of Super Legend

Please consider adding a feature where a Super Legend Shard can be returned only once per shard.

If it's only once per Super Legend Shard, you can't repeatedly change Super Legends depending on your mood by repeating the deadline.

For reasons such as these, it's very unfortunate to waste one Super Legend Shard, so if it were possible to return a Super Legend Shard once per shard, you could return it just once and get the Super Legend you truly want. After returning it once, you can't return it again, so to get a new Super Legend, you would need to get another Super Legend Shard from the gacha.

So, even for a newly acquired Super Legend Shard, if you could return it just once, people would become more interested in Super Legends and want to get them, thinking things like, "This is cool, I'll take this one!" or "This is a little different from what I expected, so let me think about it one more time." That way, you wouldn't be able to use all the Super Legends with just one Super Legend Shard, and you wouldn't have to buy another Super Legend Shard, so I think it's a very good idea!