Spiked Seal

Combat
With very low base stats (except armor) first impressions are poor, but that is deceptive. With incredible HP growth (2.0), a properly trained spiked seal can be one of the greatest tank units in the game, able to easily break triple digits. It is also a master of poison, inflicting it on both targets and attackers while being PoisonImmune itself.

Breeding
Since finding and breeding more of them is hard, it's recommended to simply fuse it with a strong spirit.

Moneymaking
They can be sold for 100 gold at Medium size and for 300 gold at Enormous size. Every level above 1 additionally increases their price by 5%.