The death ability on Worldspine Wurm turned it into a popular creature in Eternal formats
Just drop a Manifold Key and/or Witching Well on turn one, and you will set yourself up on turn two for her
Alternatively, playing a mox and a Blinkmoth Nexus was also an option
As a sorcery, you may pay the mana cost of a locked door to unlock it.) Except for the stated exception, the token created by Mirror Room's ability copies exactly what was printed on the original creature and nothing else (unless that creature is copying something else or is a token
There are other ways to draw a lot of cards with white, but I'm partial to the enchantress strategy, which in my opinion is some of the best card draw in the game, let alone for mono-white decks
* Return two target creatures that share a creature type from your graveyard to your hand