That Time I Got Reincarnated as a Slime volume 11 - Fuse and Taiki Kawakami

 Time to visit my favorite (and probably the best out there) isekai series again, and read more of the adventures of Rimuru.

Who now has become a teacher for the kids that where in the care of Shizue, and which he promised to cure of their ailness that will cut their lives short.

His plan to do so is to bound a lesser spirit into the children, like Shizue had the mighty Ifrit bound inside her.  To that end, Treynie tells him he needs to find the Faerie Queen and her ever shifting realm.  But while he ponders this, a Sky Dragon comparable in power to Charybdis attacks the city where the school is located.

A merchant saves a child and her mother from the beast, only to be rescued himself by Rimuru.  This turns out to be Gard, who bought all the healing potions in Blumund and knows Rimuru from the tales in Tempest.  With the help of the divining elf he met in Dwargon, Rimuru finds the entrance to the fairy realm.

He takes the children there, simply overcoming the guardian trial and meeting the Fairy Queen Ramiris, who is one of the 10 Demon Lords apparently despite her diminutive size.  She agrees to help save the children with binding higher spirits to them to stabilise their magicules.  During the ritual, Rimuru learns that long ago the demon lord he is out to get, Leon Cromwell, was actually a hero and he stole Ifrit to forcefully bind into Shizue.

Rimuru helps in the ritual to summon and bind spirits in three of the children, but a higher light elemental appears when Kenya is making his prayers, seeing him as a potential hero.  But when Chloe makes her prayers, a mysterious being appears that fuses with her, something not even Ramiris recognises but feels like it came out of the future.

As a thanks for the help of Ramiris, Rimuru grants her a new golem, created in a magisteel body and bound with a now named Greater Deamon he had previously absorbed during the trials of the Adventurer's Guild, naming the arch-golem Beretta and protector of Ramiris...

And that is another fun read in the series gone by, and it came with a nice extra short story of the voice actors working on the anime.  Time to reincarnate in volume 12 now it seems!