Let Sleeping Dragons Lie (Binwin) Free Play

Let Sleeping Dragons Lie (Binwin) is one of the Adventures in the campaign Dragondown. The free play variants initially only cost 500 Event Tokens. Each time you successfully earn a chest from one, the cost is increased by 500, up to a maximum cost of 2500. The cost increase is tracked per free play, so earning a chest from one will not increase the cost for the others. This gives you four discounted free plays attempts per Champion, saving a total of 5000 tokens each.