There's no legendary creature that directly supports Coin Flips
Thought Scour puts a random card into your hand, Opt lets you choose a known card or the mystery box, Sleight of Hand is the same two-card choice with an open mystery box, and Serum Visions lets you keep both or neither of the two cards you see
Journey into Nyx Standard | Eric Rill Planeswalkers (7) 1 Jace, Memory Adept 2 Elspeth, Sun's Champion 4 Jace, Architect of Thought Spells (26) 1 Negate 1 Syncopate 2 Celestial Flare 4 Azorius Charm 4 Dissolve 4 Sphinx's Revelation 4 Supreme Verdict 1 Banishing Light 4 Detention Sphere 1 Elixir of Immortality Lands (27) 5 Island 5 Plains 1 Temple of Deceit 1 Temple of Silence 3 Mutavault 4 Azorius Guildgate 4 Hallowed Fountain 4 Temple of Enlightenment Sideboard (15) 2 Nyx-Fleece Ram 1 Deicide 2 Celestial Flare 1 Aetherling 1 Blind Obedience 1 Dispel 1 Negate 1 Pithing Needle 2 Gainsay 3 Last Breath While he definitely fits there, Nyx-Fleece Ram has potential in a main-deck slot
Cards that seem a bit random on launch will often receive additional support later, effectively serving as teasers for full archetypes in retrospect
Latest decks STD 1 / 4 STD 0 / 0 LEG 2 / 0 EDH 1 / 1 MDN 4 / 1 EDH 2 / 0 CAS 2 / 0 STD 1 / 6 STD 0 / 0 STD 33 / 21 EDH 1 / 0 LEG 0 / 1 STD 1 / 1 EDH 1 / 0 CAS 0 / 0 MDN 1 / 1 STD 1 / 10 MDN 11 / 3 STD 3 / 2 STD 2 / 0 STD 23 / 40 STD 0 / 0 MDN 6 / 1 EDH 2 / 1 MDN 1 / 0 STD 3 / 3 STD 3 / 4 MDN 2 / 0
Energy Cards Energy cards are essential for deck building