Link: games.dmm.com/cp/festival/2019summer

In case people aren't aware of the link yet, there's another DMM Games campaign until August 30 involving giveaways in select games. Just log in to the games you play - max 1 count/day with x2 on some days. The rewards will be sent mid-October. There's also 50% redemption (as DMM games points) from game purchases like gacha when spending bought DMM points (up to 500pts max it seems)

The giveaway in FKG is a DGFES '19 sealstone - p.dmm.com/p/netgame/cp_2019summer/lp/title/bnr_item_fkg.jpg
Couldn't find further details but it's probably a 5* sealstone as with last year's midsummer promo.