Mason, Lord of the Fort

Whenever an equipment is attached to a
creature you control, you may pay {1}. If you
do, draw a card.

{w}{u}{b},{t}, Sacrifice an equipment: Search
your library for an equipment with mana
value equal to 1 plus the sacrificed creature's
mana value, put that card onto the battlefield,
then shuffle. Activate only as a sorcery.