Endless Magic Power surged from Isaac's body into the ever-growing heart behind him. Streams of blood gushed forth, coalescing mid-air into a tide of rats shimmering with faint blue light, squealing chaotically.
Coordinated Demon, Splitting Rat Type III!
As far as Isaac was concerned, no modified creature was better suited for the Heart of Harmony. Each rat was merely a Non-Rank Demon, possessing only a sliver of Magic Power and a tiny body. Their individual combat power was therefore pathetic—in a one-on-one fight, they couldn't even beat a goblin.
But!
For that very reason, the cost to create them was extremely low. A massive swarm could be created in an incredibly short amount of time!
Furthermore, while the Magic Power in their bodies was minimal, it wasn't nonexistent. That tiny amount of Magic Power would be hard-pressed to cast Magic or enhance their physical forms. At most, it could only slightly increase their ferocity, making it quite unremarkable.
But...
