(Mire Summit isn't a spell.)
Mire Summit enters the battlefield tapped.
Discard two cards: Put a 2/2 black Zombie creature token onto the battlefield.
: Add or to your mana pool.
: Add to your mana pool. Put Mire Summit on top of your library.
: Add 
or 
to your mana pool.: Add 
to your mana pool. Put Mire Summit on top of your library.
