An opponent controls a targetable artifact, land or creature.
({1} magic symbol) available.
Steps
Activate Mind Over Matter by discarding a card, targeting an artifact, land or creature an opponent controls.
Marchesa and Bone Miser trigger.
Resolve the Bone Miser trigger, either adding ({B} magic symbol) ({B} magic symbol) , creating a 2/2 Zombie creature token, or causing you to draw a card.
If you created a Zombie token and your mana pool is empty, activate Ashnod's Altar by sacrificing the Zombie, adding ({C} magic symbol) ({C} magic symbol) .
If you drew a card and your mana pool is empty, activate Mind over Matter by discarding a card, targeting any permanent you control, triggering Bone Miser.
Repeat from step 3 until you have resolved all Bone Miser triggers and have at least ({1} magic symbol) available.
Resolve the Marchesa trigger from step 2, causing you to pay ({1} magic symbol) to look at the top two cards of your library and put one into your hand and the other into your graveyard.