Alex legendary Coat Smith

When Alex Coat Smith enters the battlefield search A library for an artifact card and equip it to Alex Coat Smith it is a coat in addition to its other types.
Whenever an artifact or enchantment that has coat/cloak in the artwork, type, or name it enters the battlefield attached to Alex Coat smith if Alex coat smith is already equipped with a coat equip it onto another creature for {1} or its equip cost and it gives that creature +3/+3 for each coat/cloak artifact on that creature until Alex Coat smith l