User blog comment:Commander Marko/CCC5 - Linkhan, the Horseman of Apocalypse/@comment-25235491-20140911110156/@comment-4290320-20140911204651

Expanded lore exists/made for a reason. Don't be lazy, open the tab.

As far as Heca is similar to Linkhan, the only shared aspect is both of them being immortal/undead and walk on 4 feet (you get the point). Heca's lore tells the story of a particular battle where Hecarim trampled soldiers and gave them nightmares.

Oh, and so far the Shadow Isles.champs each represent one of the Seven deadly sins.