Bethany, Discoverer of Sins

Every time you cast an instant or sorcery spell,
pay one life. Then, reveal cards from you library
until you reveal an artifact (not artifact creature)
with lower or equal mana cost as casted spell.
Attach it to Bethany if possible. It is now an
enchantment with same effects except for equip.
Sacrifice enchantment attached to Bethany to
give her Ward {x}, where {x} is it's mana value.