Resets every Wednesday at 1 PM EST (Daylight Saving Time), or 12 PM EST without Daylight Saving Time.
Transformation is disabled for this battle.
Ancient Elchulus has 6 break off points. These are the tail, the two wings, the two spines on the back of it's front legs and the horn on it's head. The 8 ballista around the map can be used to hit the break points.
An attack and attack speed buff can be obtained by standing inside of a completed refuge shelter. The buff lasts for 2 minutes.