Wandering Monster How To

[Vanskat]

My husband and I are playing munchkin quest and are very new to the game. Currently, my husband is a level 10 and I am a 9, I am trying to knock him down a few levels and decided to use a wandering monster card during his battle. However, we are unsure of how to proceed. There are no standies currently available... Does this mean the card can't be used or does it mean that we have to eliminate another monster or does the card just get acquired by the original monster and they move together? If the wandering monster does go in a standie, who rules for ownership and what color standie would he be placed in?

We have been able to find no information about how to use this card properly and are at quite a stand point, as we both have differing opinions. Clarification on all aspects of using this card would be greatly appreciated.

Thanks!