The Settlers Online card trading mini game in tavern

I want to suggest to make a mini game in tavern.

A card trading game where players can spend ingame resources to buy the cards (pack,deck),
and then invite others to their tavern or being invited to play a tso theme "pvp" card trading game. (something similiar to M&M dual champions)
The cost is only for the cards.. no gambling involved.
Would need a new chat channel for tavern.

*pvp
*would be fun
*tavern building will be used
*Can be a good counterweight for all resources that are stacking up..