Have Group, Will Travel is a Guild Perk granted at guild level 21 that instantly summons everyone in the raid or party to the summoner's location. This can summon people not from the guild (in your party/raid) but you cannot use this spell in certain places. In Patch 5.0.4 this was replaced with, Ride Like the Wind. There is limited information on why Blizzard decided to remove this perk.