This battle can be done on Hero mode with up to 8 players.
The shelters and the associated buff is still in the battle.
The ballista can be used to shoot Elchulus out of the sky or aim for Break Offs.
Elchulus's breaks are much easier to get in this battle compared to The God of Fomors. In this battle, only the tail and two front spines are considered break offs. The horn and wings drop as normal items.