Chikashitsu Dungeon: Binbou Kyoudai wa Goraku wo Motomete Saikyou e - Vol. 4 Ch. 25

[MangaDex]

 

[Seinvolf]

Thank u always for ur great work...
^^...

A duration battle phase?
Cant kill it on time will make it enrage?
(OωO`)...

 

[ciera]

Thanks for the mass release

 

[xSauriaNx]

Thank u always for ur great work...
^^...

A duration battle phase?
Cant kill it on time will make it enrage?
(OωO`)...

more like, the trigger was the alternating ganking mechanics.

Seems like if the boss/rare monsters are being fought outside of their usual style, they'll trigger a rage mode where they'll counter said tactics against them.

Hobgoblin getting parried => evolve to a brute force Goblin King to ignore parrying and deal direct damage
Black Knight getting ganked by "cowards" => change to a raging Zinogre and chasing enemies 'till their formation breaks down.