Meraxes

The RAGE - he will enter this state for taking constant damage so similar to the giga but wont knock you off..during this buff(45sec) Meraxes is immun to all types of bleed,15% increase to damage and defense.
But can be cancelled and prevented with the PANIC Debuff is active.(Idea by Mister_Muffin)

Panic debuff - new debuff that can be triggered when Meraxes is on flames(any fire debuff).

Taming Method - Sacrifice
To tame one of these big fellas you have to let it kill one of your high level tames(Giga,any wyvern,spino,magmasaur,yuty,Managarmr..) but only when they are babies.
MUST BE ON NEUTRAL not passive.

The saddle is unlocked on level 96 (300xFiber 600xHide and 100Metal).
Can be crafted in your inventory and there is a chance when you kill a wild Meraxes it can drop a Saddle BP.