To collect Dragon Glass, players must win a battle against the Ice Dragon. When anyone in the Treaty enters a domain with a Dragon Glass Token, immediately move the Ice Dragon to that domain. The player is considered the defender in this battle and the Ice Dragon is the attacker (perhaps with a White Walker that was already there). The Ice Dragon has a strength of and draws a Secret Card ():

• If you win the battle, collect the Dragon Glass Token and the Ice Dragon returns to the spot where the Wall was.

• If you lose the battle, you suffer the standard cost of losing and must retreat from that domain. The Dragon Glass Token remains face-up in that domain, and the Ice Dragon stays in that domain as well. If the dragon is still there when the Treaty enters that domain again, you are attacking the Ice Dragon this time.