Using the updated ravening hoards of a 6th edition Warhammer armies book or the Dogs of War, Lizardmen armies from the white dwarf. The first opponent you fight will be random. The rest of the battles will be using a Swiss system to determine your next opponent. Battle results must be in before the next battle. This is done by a d6 roll.
Higher roller decides.
Scenery is generated using the defenders terrain generator pg 223-228 in Warhammer Rules. 3 - Defender places first terrain piece anywhere on the game table, than the attacker. Until no terrain pieces remain. This will be the final battlefield. 5 - Attacker rolls for scenario , using the special scenario chart.