Guild Extensionhttps://irowiki.org/wiki/Guild_Extension

Guild Extension (Alt: Guild Extension) is a special passive skill available to Guild masters.

Effect

Raises the maximum capacity of guildsmen that can be accepted by the guild at once. Without this skill, a guild can hold up to 16 members.

Guild System
Guild Skills	Battle Command • ~~Charisma~~ • Cold Heart • Contract with Kafra • Glorious Wounds • ~~Glory of Guild~~ • Guild Leadership • Guardian Research • Guild Extension • Official Guild Approval • Permanent Development • Regeneration • Restoration • Sharp Gaze • Strengthen Guardians • Urgent Call • Guild Storage Extension
War of Emperium (~~WoE Point System~~ • God Items Quest • Guild Dungeon Investment System) • War of Emperium 2 (God Items Quest 2) • War of Emperium Training Edition (God Items Quest 3)