Tony saves kid!Jörmungandr from sea cave
This is a post-CW fic where Tony saves Jörmungandr from a sea cave where he was trapped in huge snake form, though he turns into a child after being released. Tony then takes him to the US (NY?) and adopts him. There are sleep messages/threats from Loki, visits to botanical gardens, etc. May be Tony/Loki at the end, but I'm not 100% sure. Anyone, please?