Some tests were done and the results were as below.
I have to upload the images to Imgur due to the 256 KiB limitation of the Forum
TWO CONDITIONS
A. The Fyrnir was enraged by the card use in his fight, in this case, that was Hamask.
(
http://imgur.com/a/pdnI6 )
B. The Fyrnir was enraged by other charactes through his character ability.
(
http://imgur.com/a/tpgIE )
Through the images, you could note two strange things in both conditions :
1.
The Fyrnir's HP was the same during the following turns. According to the Card, Fyrnir should heal my "characters" at the start of fight if he was enranged. He sould have healed himself.
2. The rage bonus would disappear
at the end of the first turn. In the pictures of condtion B, you could see the appearance and the characteristic clearly.
Please report the bugs, thanks a lot.