Develop Your Brain is often used in late-game control decks to filter and find the key cards needed to set up their win condition

(Bevy of Beebles) Basri Ket Basri, Devoted Paladin Calix, Destiny's Hand Chandra Ablaze Chandra Nalaar Chandra, Acolyte of Flame Chandra, Awakened Inferno Chandra, Bold Pyromancer Chandra, Dressed to Kill Chandra, Fire Artisan Chandra, Flame's Catalyst Chandra, Flame's Fury Chandra, Flamecaller Chandra, Flameshaper Chandra, Heart of Fire Chandra, Hope's Beacon Chandra, Legacy of Fire Chandra, Novice Pyromancer Chandra, Pyrogenius Chandra, Pyromaster Chandra, Roaring Flame Chandra, Spark Hunter Chandra, Torch of Defiance Chandra, the Firebrand Comet, Stellar Pup Commodore Guff Dack Fayden Dakkon, Shadow Slayer Daretti, Ingenious Iconoclast Daretti, Scrap Savant Davriel, Rogue Shadowmage Dihada, Binder of Wills Domri Rade Domri, Anarch of Bolas Domri, Chaos Bringer Domri, City Smasher Dovin Baan Dovin, Architect of Law Dovin, Grand Arbiter Dovin, Hand of Control Ellywick Tumblestrum

The first activated ability of Ayara, Widow of the Realm uses the mana value of the permanent you sacrificed as it last existed on the battlefield, not its mana value in the graveyard
However, we ran into situations like this that kind of caused us to scratch our heads for a bit: Beast - Tragic Hero has printed Shift cost of 3, but we had no cheaper Beast character card to shift from
Sami, Wildcat Captain could have no other text and itd be worth a look
Lets take a look at these legendary figures and what they mean for both franchises