In an EDH (Commander) game recently, Alice used Thada Adel, Acquisitor to steal an artifact out of Bob's deck, the Elixir of Immortality, and cast it.
That artifact's ability says:
{2}, {T}: You gain 5 life. Shuffle Elixir of Immortality and your graveyard into your library.
When Alice uses that ability, what happens to the artifact? Does it go into Bob's graveyard or get shuffled into Alice's library? Does Alice still even shuffle her graveyard into her library and gain 5 life?