Spend this mana only to cast a face-down creature spell, pay a mana cost to turn a manifested creature face up, or pay a morph cost
In your draw step you can draw, for free, two more cards and then place two cards you've drawn on your deck in any order, so it's like a free Sensei's Divining Top, and if you replace those draws with something like Abundance then you'll not have anything to put back so you get all three effects
This is only one of two reprints of this card that exist despite its playable effect, and it is the most expensive of them all, thanks to the amazing artwork taking the words Swan and song literally
Which kinda sucks
cards to pay for them, and will attack Leaders and other Characters using their own cards, in the hope of being strong enough to make the opponent draw cards from their Life area until they have none left to draw