You want your staple cards, like Bolas's Citadel, Righteous Valkyrie, Gray Merchant of Asphodel, and so on
Weakness: Fighting (x2) Resistance: none Retreat: 1 147
The obvious choice is Ishai, Ojutai Dragonspeaker, but we'll talk more about Ishai later
If you decide to play Shock Lock, you should believe that you will face only a couple of decks during the course of a tournament whose primary game plan counters yours
That is a +4 swing in card advantage, plus you already have 2 Level 4 monsters on your field, ready to perform an Xyz Summon
Anrakyr the Traveller Chronomancer Cryptek Flayed One Hexmark Destroyer Illuminor Szeras Imotekh the Stormlord Lokhust Heavy Destroyer Lychguard Necron Deathmark Necron Overlord Plasmancer Psychomancer Royal Warden Sautekh Immortal Skorpekh Destroyer Skorpekh Lord Szarekh, the Silent King Technomancer Tomb Blade Trazyn the Infinite Triarch Praetorian Triarch Stalker