This is a Fishary house which add a featuer to the game to start fishing new /old items to craft new/old battle items in while offline or waiting online chating or doing map or war.
Ofc could be regular/permuim fishing net, that can collect the items.
Also a player can have 1 or X amount of boats to sail for a price if gems, this also can be add to the VIP as new addition.
I mean Come on ppl we are in a water community and its clear that if there is fresh water there will be fish!
So stop wasting the running water and get us the fishary house
MxJune - they are adding more heroes, empowering (mask) the old ones (but not the first HOTM - Hel) and stronger firepower (limit breakers) so players stay and $pend more and more. These are easy to do rather than redesigning the game to generate firepower like making new building so heroes can have their costumes made rather than buying - for free than $. Now, always fight unlike the start up, building structures. The game i$ overpopulated.
They did mention that they may have a couple ideas for new buildings in the Spring 2021 Q&A. So look over in that thread for the potential new bulding ideas.
I suggest a new building is a tailor shop / dress shop that will saw
fit costumes to all heroes of choice. As trend of Zynga, creating costumed heroes to be pulled.