Guild Advancement was a feature which allows guilds to level in a way similar to characters. There were 25 levels for a guild to progress through. Experience towards level progression was gained through guild member participation in raid boss kills, Rated battlegrounds victories, Arena victories, and completing quests/daily quests. To qualify for guild XP, a raid or PvP group must have been composed of at least 75% guild members. Participating in these also granted players reputation with the guild, which allows them to buy guild-bound items like heirlooms and raid materials with gold. Originally there was also going to be a guild currency and a guild talent tree system, but those were scrapped.