Clash of Clans has a Barbarian King and an Archer Queen which are special units that can be reused in battle '" they just require hours of time to heal back to full health. It has more realistic graphics that evoke a more serious tone, but otherwise it is almost identical mechanically and thematically. Throne Rush hands you a few gems by completing in-game missions, but there's not reliable source like Clash's debris. http://thronerushgemgenerator.blogspot.com