Decayed gives the designers a tool to balance out future designs, so it seems reasonable to print a creature with gigantic stats and decayed at a low mana value: The decayed drawback means the strengths of the card can be pushed in a different direction
While this deck is built to get the most out of the triggers, I think it's a lot of extra work for not the best payoff
Gallery and List of Discover Cards Brass's Tunnel-Grinder / Tecutlan, the Searing Rift Buried Treasure Caparocti Sunborn Chimil, the Inner Sun Contest of Claws Daring Discovery Digsite Conservator Dinosaur Egg Ellie and Alan, Paleontologists Etali's Favor Geological Appraiser Hidden Cataract Hidden Courtyard Hidden Necropolis Hidden Nursery Hidden Volcano Hit the Mother Lode Hurl into History Long-Range Sensor Monstrous Vortex Pantlaza, Sun-Favored Primordial Gnawer Quintorius Kand Scalesoul Gnome Swashbuckler's Whip Trumpeting Carnosaur Walk with the Ancestors Zoetic Glyph Zoyowa's Justice Aloy, Savior of Meridian Lara Croft, Tomb Raider Best Discover Cards #7
A Charizard card for the Pokmon Trading Card Game has sold for $420,000 (318,731), becoming the third-highest price paid for a Pokmon TCG card