Looking for an underwater AoS map

[NhazUl]

So, couple of years ago I happened on a very well made AoS. It was naga-themed and there was an unique aspect: you could switch between ground and underwater view. Like, your hero swims on the surface and walks onto some islands, then you submerge and fight underwater on the ocean bottom. I'd like to look into the systems used in this map, so has anyone seen the likes of it?

 

[Softmints]

Calm down everybody, the situation's under control, I got this one covered.