Complex sentence: Players can also buy, for real-world money, an in-game premium currency called gems which enable them to instantly complete building upgrades, speed up troop-training and resource-collecting, and buy certain buildings and other improvements.
Split into simpler sentences: Players can also buy, for real-world money, an in-game premium currency called gems. Gems enable players to instantly complete building upgrades, speed up troop-training and resource-collecting, and buy certain buildings and other improvements.