this one thing where they give you a poem at night about taking a rose from heaven and waking up with it and the next morning theres a rose outside your door, among other things.

They seem to have borrowed the idea from Coleridge:

If a man could pass through Paradise in a dream, and have a flower presented to him as a pledge that his soul had really been there, and if he found that flower in his hand when he awake — Aye, what then?