Power Beasts are creatures in Monster Legends that can be summoned when a battle starts. They boost Metropolitan and Doomsday Era monsters depending on their elements.

Power Beasts dwell in The Bestiary and are unlocked at level 18.

To unlock a Beast, players must obtain shards for it at the Beast Dungeons.
Power Beasts can be upgraded up to level 6 by collecting and ranking up monsters of their element.
As they level up, their stats improve and they gain new abilities.