Glistening Shard

You may pay {p/c} and exile one colorless card
from your graveyard rather than pay this
spell's mana cost
Glistening Shard enters the battlefield tapped if
life was paid to cast this spell.
{t}, Pay 1 life: Add {c} to your mana pool.

Metalcraft- {p/c}{p/c}, Sacrifice Glistening Shard:
Add one mana to your mana pool of any type
artifacts or creatures you control produce.
Draw a card.