Originally Posted by Maladaptive

Thanks, got 10 medals on the 30 stamina map. That is going to be a real grind!

Worst part, it seems the sun medals are only available till 11th of July. No idea whether they'll return at some later point.
I'm seriously considering using a dozen FGs to get it though, it's a good necklace (it being gold with high ATK, and seeming to give SLICE to 3 girls or something like that? Anyone have more info?)