Epic Rolldown

The shop action that discards the visible champion shop and draws a new set, costing 2 gold by default. Players reroll to find copies of specific champions, since combining three of the same champion upgrades them from 1-star to 2-star, and nine copies reach 3-star. The shop also refreshes for free once at the start of each round. Some augments and items grant additional free rerolls or shop refreshes.

The player-side progression resource. Spending gold on XP buys it; each level raises the team-size cap and shifts shop odds toward higher-cost champions. Augments grant XP directly or trigger off "level up" to accelerate the curve.