While in Arena Warlord I difficulty, I encountered a team that had a hero with the Dragon fire weapon/spell. The hero unleased the spell once and turned into a fully traited Sylvanimora.
I’m sure this an oversight as I don’t need to point out that this is unfair, seeing as none of my troops have any of their traits in Arena mode.
Needless to say, Sylvanimora took over the fight and it didn’t last long lol.
It is a known bug that transform in Arena means troops transform into a version with traits if you have that unlocked.
Baby Dragon is an offender too.
No eta on the fix though.