Assuming you've seen them
It may cost 8 mana, but when it resolves, your hand is packed with tools to take over the game

Altar Of Dementia Aluren Apocalypse Auratog Avenging Angel Bellowing Fiend Benthic Behemoth Booby Trap Bounty Hunter Caldera Lake Canyon Drake Carrionette Chaotic Goo Coffin Queen Cold Storage Commander Greven il-Vec Corpse Dance Crazed Armodon Cursed Scroll Deadshot Death Pits of Rath Dirtcowl Wurm Dracoplasm Dregs of Sorrow Duplicity Earthcraft Echo Chamber Eladamri's Vineyard Eladamri, Lord of Leaves Elven Warhounds Emerald Medallion Emmessi Tome Energizer Ertai's Meddling Escaped Shapeshifter Extinction Fevered Convulsions Field of Souls Flowstone Sculpture Flowstone Wyvern Fool's Tome Fugitive Druid Furnace of Rath Gerrard's Battle Cry Grindstone Hand to Hand Hanna's Custody Heartwood Giant Helm of Possession Humility Intuition Jet Medallion Jinxed Idol Kezzerdrix Living Death Maddening Imp Magmasaur Magnetic Web Mana Severance Marble Titan Mawcor Meditate Minion of the Wastes Mirri's Guile Mongrel Pack Nature's Revolt No Quarter Oracle en-Vec Orim, Samite Healer Pallimud Pearl Medallion Pegasus Refuge

As you start having more cards in your Inkwell, then switch to adding low-cost cards so you can play your most powerful Characters and Items
Around June, speculators took advantage of the cards price dip with a series of buyouts on June 10, 20, and 24 (11.0, 4.5, and 10.0 average copies per buyer, respectively), following which the cards Market Price shot back up and passed its previous all-time high