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It has no relevant ability until you get to seven cards in your graveyard

Its very apparent that Computer Search helps out here in completing the combo. By contrast, decklists for Darkrai EX seem mixed up on what ACE SPEC to include

Mother of Runes (T1, Ext, S, Block) Talk about a single-target Glory, I present Mother of Runes

You could create some pretty lopsided combat with Obscuring Haze, which is the best of the five if youre actually paying mana to cast it

Once per turn, when a card(s) is added from the Main Deck to your opponent's hand (except during the Draw Phase or the Damage Step): You can destroy that card(s)