The Fate and Origin of the Istari

[Tar-Alcarin]

In the Letters of Tolkein he mentions this

...and I suspect [Alatar and Pallondo] were the founders or beginners of secret cults and 'magic' traditions that outlasted the fall of Sauron.' (The Letters of J.R.R. Tolkien, No. 211).

This amy mean that they went into the east, started a cult and had rave parties deep underground in the ruins of Angbad. Smoked (pipe)weed and snorted crack(s of doom) For all we know.