All kidding aside, elementals are more than just another mob type in Dark and Light. Since players can eventually craft their own from the remnants of defeated foes, it’s important to know which type does what. For example, the stone elemental is ideal for guarding a base, while light elementals are the most powerful (and deadliest to attack) for an offensive partner.
Or what about befriending your own Olaf? “Tamed Ice Imps loyally follow their masters, lending a hand in combat and using their natural iciness to preserve food and various perishable reagents while you’re exploring the world! This property makes keeping an Ice Imp around a major priority for any adventurer struck with wanderlust.”