Thaumaturgic Key

When Thaumaturgic Key enters the battlefield,
if you cast it, draw a card for each artifact you
control.
Whenever a charge counter is put on an artifact
you control, you may pay {1}. If you do, draw a
card.
Instants and sorceries you cast cost {1} less to cast
for each charge counter on Thaumaturgic Key.

The key was nothing, the crystals were everything.