CarlManvers2019
Writers Blocked Douchebag
Wizards - Tolkien Gateway
tolkiengateway.net
Eru Illuvatar and/or the Valar choose to send the Istari over to the Planetos in order to “guide” or help the men of this world against whatever dark or eldritch forces or even against themselves
Their appearance occurs sometime say, a decade before Aegon’s Conquest of Westeros