If you want the same effect now, you have to pay (3)(U)(U), with Capture of Jingzhou or Temporal Manipulation
There is no mulligan rule
Overall, this ghost not only looks great, but it is quite strong as well
Abzan Banner Abzan Monument Acidic Dagger Aeolipile Aerial Toastmaster Aether Spellbomb Aetherjacket Agent's Toolkit Alchemist's Vial All-Fates Scroll Altar of the Wretched Amulet of Quoz Ancestral Carvings Anchovy & Banana Pizza Apocalypse Chime Arcade Cabinet Arcane Spyglass Arcbound Ravager Ark of Blight Armillary Sphere Ashad, the Lone Cyberman Ashnod's Coupon Ashnod's Transmogrant Astrolabe Azorius Cluestone Azorius Locket Bag of Devouring Bag of Holding Bagel and Schmear Balm of Restoration Barbed Sextant Barrels of Blasting Jelly Barrin's Codex Basilica Skullbomb Bear Trap Black Lotus Blasting Station Blitzball Blood Fountain Blood Servitor Bloodtallow Candle Booby Trap Boom Box Boros Cluestone Boros Locket Bosh, Iron Golem Bottle of Suleiman Braidwood Sextant Brainstone Breya's Apprentice Breya, Etherium Shaper Bronze Calendar Broodheart Engine Bumbleflower's Sharepot Buried Treasure C.A.M.P

They cost about $3 and includes four cards, so it doesnt seem like it would take too much to make a profit
Card fronts have an illustration of the character while backs give info like Pokemon types, their first television appearance and other background facts