A grade of 10 corresponds to a card in perfect condition, and a grade of 1 to a card in poor condition
between investmentgrade storage and fading artwork
Alela, Artful Provocateur Aminatou, Veil Piercer Arna Kennerd, Skycaptain Bane, Lord of Darkness Chromium Chromium, the Mutable Dakkon Blackblade Dromar, the Banisher Elenda and Azor Eriette, the Beguiler Ertai, the Corrupted G'raha Tia, Scion Reborn Halfdane Inquisitor Greyfax Kamiz, Obscura Oculus Lady Evangela Marneus Calgar Merieke Ri Berit Nevinyrral, Urborg Tyrant Nihiloor Noctis, Heir Apparent Noctis, Prince of Lucis Oloro, Ageless Ascetic Queza, Augur of Agonies Raffine, Scheming Seer Ratonhnhak:ton Saruman of Many Colors Sefris of the Hidden Ways Sen Triplets Sharuum the Hegemon Sidar Jabari of Zhalfir Soundwave, Sonic Spy Sydri, Galvanic Genius Temmet, Naktamun's Will The Destined Warrior The Ever-Changing 'Dane The Master of Keys Tivit, Seller of Secrets Toluz, Clever Conductor Urza, Chief Artificer Varina, Lich Queen Y'shtola, Night's Blessed Yennett, Cryptic Sovereign Zur the Enchanter Zur, Eternal Schemer

You can choose which (three!) creatures are most threatening (one on each board) and get rid, kind of like a reverse Porphyry Nodes
Getting to set up your graveyard on turn one for a Vengeance on turn two is something the Esper variant is incapable of
The minimum age for use is twelve