Numerous Arsenal

Whenever a creature you control is equipped for
the first time of your turn, you may pay {1}. If
you do, draw X cards, then discard X-1 card,
where X is the equip ability cost.
"The dwarves in Erebor made not only things of
wonder and beauty but weapons and armour of great
worth; and there was great traffic of ore between them
and their kin in the Iron Hills."
- The Return of the King