Hecarim's soul fused with his horses due to the Ruination.
Most horse species shown in the setting retain most of the physical characteristics of earth horses.
Just like their earth counterparts, horses are domesticated animals bred as mounts for sapient species such as Humans. From Demacia, Noxus, Freljord, Ionia, to Shurima, horses are an integral part of society for transport, as non-horse driven carriages are only limited to few places such as Piltover and Zaun.
In Demacian version of Tellstones, the piece known as The Knight has a horse on it. It symbolizes the Dauntless warriors and his loyal steeds.
These species were only mentioned, but were never elaborated on.
Lippertick Apple ·
Salamander Dew ·Unnamed Species