I got this cool card called Muse Vessel, it is an Artifact out of diss. I do not completely understand how to use the last part of it's activated ability, being: "Choose a card removed from the game with muse Vessel. You may play that card this turn." Is the removed card placed face up or down? The the cost of 1 colorless mana encompass both looking at all of the removed cards or one randomly. Also can I play this card with out paying it's converted mana cost?