This card is tough to judge. It all depends on your primary goal.
Goal 1- To destroy Equip Spell Cards. 3/10. I give it this score for 2 reasons: 1) Because of the outrageous cost it takes to destroy what are often rarely used cards, and 2) it specifies that I must destroy my opponent's card. That gets rid of my ability to chain say a Black Pendant discard for a Black Pendant destruction.
Goal 2- To enhance combos from the Graveyard. 6/10. This would let me get literally any card from my hand to my Graveyard, but again with the draw back of your opponent's monster needing an Equip Spell and then it also has to attack. The only advantage here is the ability to eliminate 1 card from my hand to chain with.
Overall- 4.5/10