Boris, Weapon Animist

Equipments you control are creatures in
addition to their other types, with base power
and toughness equal to x/y, where x is its
converted mana cost and y is its equip cost,
(They are still equippable and are not
creatures when equipped).
Creatures you control get +X/+y, where X is its
equipments combined converted mana cost, and
y is its equipments combined equip cost.