Ferrox and determination tokens

By cheezburger, in DungeonQuest

how does it work with encounters with ferrox and determination tokens?

heroes having 3 or 4 of strenght can hope to deal with a ferrox stacking determination tokens? or must die because

brother gherin can use only one time his ability to spend 1 life to gain 3 determination tokens and to pass only one strenght test? in that case his ability is useless!