To use the Red Wizards Faction Pack in your D&D Onslaught game, first, add the faction to your existing game setup. The spellcasters among the Red Wizards can summon minions during the game. When a summon happens, use the provided tokens to represent the summoned creatures. If you've bought the separate miniatures from WizKids, you can swap the tokens for these more detailed models. As for maintenance, keep the tokens and miniatures in a dry and clean place to prevent damage. When handling, be gentle with the miniatures to avoid any breakage. Enjoy exploring new strategic gameplay with this exciting faction pack!