Pyrrhic Mastery

When Pyrrhic Mastery enters the battlefield,
exile your graveyard.
You can't pay mana to cast spells. Instead, when
you cast a spell from your hand, exile the top
card of your library to pay for {1} or one mana of
that spell's color. Exile any card that would be
put into your graveyard.
If you can't be great, at all costs be great at faking it.