yes, as the Topic said. boss card should be tradable too, other than only use in Card battle.
for certain class like Sorcerer or Necromancer that really use boss card in real battle rather than only use it in cardbattle mini-game like other class. My friend just got a card that I want so I try play cardbattle to get it… I lost 14time in a row… Most of my card gone… along with my performance in battle without those card… who the hell come up with the idea of making boss card untradable? seriously? atleast they should make it tradable too…