Not too hard. They'd have to install a Gil-Archer card and let the Bersercar blow itself up with its cannon.

Or just have Miyu use the Rider card and run away. The Bersercar is pretty slow after all. Ilya could just fly upward I imagine, since the bersercar has a fixed cannon. Rin and Luvia would probably get blown up, but they are very resistant to falls and explosions in this series it seems.