When you complete a Collection, you transfer to the Grand Collection and unlock the Grand Prize Chest, which includes valuable rewards — such as boosters, cash, and a unique profile badge!

Once you claim the rewards, your cards and duplicates are reset. However, your Star balance (used for exchanging duplicates) is not reset — it carries over to the Grand Collection.
⭐ Please note that Stars only transfer from the regular Collection to the Grand Collection, and not between different Collections.

After that, the Grand Collection begins!