Think about gem battles for a second

leander-ligo:

Gems being damaged enough to require regeneration in their gems but not enough damage to destroy them

Hasty and unstable fusions trying to do as much damage to the opposition as possible

Fusions of 5, 6, or even more gems dominating the landscape fighting other massive fusions

Damaged gems waking up days later, looking for their friends or significant others only to find them dead

Gems whose entire role on the battlefield is collecting the damaged/regenerating gems laying on the ground

Gems like Rose who have healing powers having to repair dozens or hundreds of gems who may or may not be their ally

Gems wandering the battlefield, collecting as many of a certain type of gem they can, hoping one of them is their significant other

Holy crap gem battles