The hope is that you can cast two bomb spells for free and the targeted opponent turns up a dud
Expedite is a red spell that replaces itself, which adds to the frequency with which Chandra gets to flip
Copies in MCV Decks shows how many total copies of the card were registered in decks for Mythic Championship V and how that number ranks (excluding lands)
This means that for these larger-scale problems, larger-scale answers are in order

Elminster | Commander | Stephen Johnson Commander (1) 1 Elminster Creatures (14) 1 Ancient Gold Dragon 1 Archaeomancer 1 Cryptic Annelid 1 Diluvian Primordial 1 Kozilek, Butcher of Truth 1 Lunarch Veteran 1 Mirror Entity 1 Oreskos Explorer 1 Sigiled Starfish 1 Solemn Simulacrum 1 Soul Warden 1 Sphinx of Uthuun 1 Ulamog, the Infinite Gyre 1 Windreader Sphinx Instants (21) 1 Aetherize 1 Aetherspouts 1 Brainstorm 1 Case the Joint 1 Chain of Vapor 1 Counterspell 1 Cyclonic Rift 1 Deliberate 1 Expose to Daylight 1 Fierce Guardianship 1 Force of Will 1 Guiding Bolt 1 Judge Unworthy 1 Overwhelming Intellect 1 Path to Exile 1 Pongify 1 Rapid Hybridization 1 Swan Song 1 Swords to Plowshares 1 Synthetic Destiny 1 Voyage's End Sorceries (13) 1 Aminatou's Augury 1 Anchor to the Aether 1 Approach of the Second Sun 1 Bond of Insight 1 Foresee 1 Interpret the Signs 1 Mass Polymorph 1 Preordain 1 Refurbish 1 Scour All Possibilities 1 Serum Visions 1 Storm Herd 1 Temporal Mastery Enchantments (6) 1 Divine Visitation 1 Intangible Virtue 1 Mystic Redaction 1 Penance 1 Retreat to Coralhelm 1 Smothering Tithe Artifacts (6) 1 Arcane Signet 1 Azorius Signet 1 Coat of Arms 1 Eldrazi Monument 1 Sol Ring 1 Thought Vessel If you wanted to tune this deck up, you could load up on fast mana, throw in some higher-powered staples like Mystic Remora and Rhystic Study and shoehorn some cEDH wincons into this list but I'm not sure it's ever going to get that close to being a real cEDH deck
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Legendary Creature Enchantment - Demigod Color tag templates(None) Linden, the Steadfast Queen Vigilance (Attacking doesn't cause this creature to tap.) Whenever a white creature you control attacks, you gain 1 life