Rezar, Famed Spellsmith

{1}, {t}: Add {u}{r}{w}. Spend this mana only to
cast Aura or Equipment spells or activate abilities of Auras or Equipment.

Whenever a creature you control attacks, it
deals 1 damage to any target for each Aura and Equipment attached to it. If 3 or more damage
is dealt this way, draw a card.