Complex sentence: Gems are used to buy Brawl Boxes, coin boosters, and skins for decorating brawlers and can only be obtained by purchasing them from the in-game shop with real money.
Split into simpler sentences: Gems are used to buy Brawl Boxes, coin boosters, and skins for decorating brawlers. Gems can only be obtained by purchasing them from the in-game shop with real money.