Worldspine Wurm is copied by the token-creating effect of Sublime Epiphany. Later, the token dies. Will the triggered ability, "When Worldspine Wurm is put into a graveyard from anywhere, shuffle it into its owner's library" trigger and get put onto the stack?
It's clear that the token's other triggered ability, "When Worldspine Wurm dies, create three 5/5 green Wurm creature tokens with trample" will go off successfully, as this LTB triggered ability can look back in time to when the token was on the battlefield. It's also clear that a Glasspool Mimic copying Worldspine Wurm would get only the LTB triggered ability and not the "from anywhere" triggered ability, since immediately after Glasspool Mimic was put into a graveyard, the game would see the printed characteristics of the card, effectively overwriting the characteristics it had as a copy, and thus its rules text would no longer include the "from anywhere" triggered ability.
Returning to the initial question, the token does exist in the graveyard at the time the "from anywhere" triggered ability would trigger (state based actions would not have been performed yet after the token was moved), and in contrast with Glasspool Mimic, it is not obvious that the token has any printed characteristics that could overwrite the rules text it had on the battlefield. Does it become some sort of "default token" with "default characteristics" while in the graveyard awaiting state based actions (and thus the "from anywhere" triggered ability would not trigger), or does it still have its copied characteristics (and thus the "from anywhere" triggered ability would trigger)?