Bismuth, Weaponsmith

Bismuth costs {1} less to cast for each equipment
you control.
To The Forge! - {t}: Add one mana of any color.
Put a lava counter on Bismuth. If there are 3 or
more lava counters on Bismuth, you may search
your library for The Forge and put it onto the battlefield tapped, then shuffle your library.
Equipped Humans and Gems you control get
+2/+1.