Let me explain it in a way that was explained to me. Factions are based off the "Big Three" in LoL. The factions (theme, name, champions, etc.) come from LoL lore were there are multiple countries that fight one another in a tournament called LoL. From these countries there are three that stand out similar to the "Big Three" automotive companies. You have GM, Ford, and Chrsyler; or in LeagueCraft: Noxus, Ionia, and Demacia. In LoL you also have countries that are like Toyota, Honda, Volkswagon, etc.; they are known to players but arent currently big enough to be a part of the LeagueCraft server. All factions are headed by one owner on the server.
Factions is a Bukkit plugin, or mod for Minecraft. It allows factions/countries/teams to claim chunks of land. Once a chunk is claimed, only members of that faction can place blocks, destroy blocks, open chests, etc. However be wary. Every faction has "power." Power is gained by the amount of players a factions has. However if s player begins to die he lowers the factions overall power, thus allowing enemy factions to claim your land, loot your items, and destroy your creation. EVERY DEATH COUNTS.
Each faction has a central castle as seen to your left. Ionia on top has a castle based on a "havenly state" or oasis theme. Noxus, the middle castle (or mountain) has a hellish/evil theme. And Demacia, your final castle, has a "human civilization" theme. Every castle has been specifically chosen to be PVP ready and to fit in the the lore of League of Legends, our Minecraft servers theme.
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