Under the sea. Under the sea. That's where the Idoneth Deepkin normally live. However, they're headed ashore to wreak havoc in Age of Sigmar. And just like every faction, they're getting an update. Get a preview of them here.
From the article:
For a few weeks now, we’ve been asking the playtesting team for some tips on using every faction in the new edition of Warhammer Age of Sigmar. The Idoneth Deepkin are no exception, so read on to learn all about the soulless, outcast aelves of the deep and dangerous seas.