But he is a scary opponent
The chosen effect can be from any source, including one controlled by an opponent

Accursed Duneyard Adanto, the First Fort Anointed Deacon Anowon, the Ruin Sage Arterial Flow Baron Bertram Graywater Baron Sengir Bishop of Binding Bishop of the Bloodstained Blade of the Bloodchief Blood Tribute Bloodbond Vampire Bloodline Keeper Bloodline Necromancer Bloodlord of Vaasgoth Bloodmad Vampire Bloodthrone Vampire Call the Bloodline Call to the Feast Canonized in Blood Captivating Vampire Charismatic Conqueror Chosen of Markov Circle of Confinement Clavileo, First of the Blessed Cleansing Ray Coat of Arms Cordial Vampire Crossway Troublemakers Crossway Vampire Crovax the Cursed Dominating Vampire Drana, the Last Bloodchief Dreamdrinker Vampire Dusk Legion Sergeant Duskborne Skymarcher Edgar Markov Edgar Markov's Coffin Elenda and Azor Elenda's Hierophant Elenda, the Dusk Rose Evelyn, the Covetous Falkenrath Gorger Falkenrath Pit Fighter Forerunner of the Legion Furyblade Vampire Ghalta and Mavren Gift of Fangs Glass-Cast Heart Grim Captain's Call Guul Draz Vampire Havengul Vampire Hungry for More Indulgent Aristocrat Kalastria Highborn Kalitas, Bloodchief of Ghet Kalitas, Traitor of Ghet Krovikan Vampire Legion's Landing Lord of Lineage March of the Canonized Markov Crusader Markov Enforcer Markov Retribution Martyr of Dusk Master of Dark Rites Mavren Fein, Dusk Apostle Memory Vampire Mephidross Vampire Mindless Null Neonate's Rush New Blood

If one in 100 Collector Booster packs has a serialized card (Wizards has said its a worse chance, without being specific) then that means every eighth box ought to have a serialized card
Illustrated by Mark Behm Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
Disadvantages of CGC Less recognition: although its reputation is growing, CGC has not yet reached PSA's level of name recognition among all collectors, particularly in the Asian market