Ethereal Waltz

As long as you control a Human, you may look at the
bottom card of your library any time, and you may cast
Spirit creature spells from the bottom of your library.

As long as you control a Spirit, you may look at the top
card of your library any time, and you may cast Human
creature spells from the top of your library.

As long as you control a Human and a Spirit, you may
cast creature spells from your graveyard. If you cast a spell
this way, that creature enters with a