Honorable Mention #3: Twinblade Assassins Deathreap Ritual
In some matchps the turn one Aether Vial is the scariest play that is most important to stop, in others the seven mana Karn Liberated, on all the various scary important spells to stop Force of Will offers you the best or near best odds on stopping it
(Accelgors BR results have yet to be seen, but it also causes two different Special Conditions and is considerably different.) All three are searchable by Level Ball so you can get them out quickly, retreat them into Gothitelle EPO 47 after attacking, and then retreat Gothitelle at the start of your turn with Dodrio UD and Retreat Aid, repeat ad nauseum
A rumored Super Bowl XXV 'ticket' card was included in a 25-pack (Super Bowl 1-25) for a male fragrance ('Splash,' The Scent of Victory?) that was sold at the event
In Commander, that shuts off a shocking number of decks
The best you could do would be maybe sit on a Zenmaines