To challenge someone, just have a match with them, simple. The winner shouts down here and I will change the scores.
The match can be with anything, so long as you both agree beforehand that you both accept this fight. You shout Evilswarms, your opponent shouts Constellars, and if both of you agree, then the match can begin!
Remember while you represent your faction, you can use anything, this is to prevent just meta decks from being played.
Have fun! This is the most important rule XD Any problems you have just post them below!