Bloodghast doesnt require mana to return to the battlefield, which is a significant advantage over Gravecrawler in the very early portions of the game
from Fallout and Mardu Surge from Tarkir: Dragonstorm Commander )
Dealers can include a fresh sleeve with every sale, buyers appreciate the polish, and no one worries about supply shortages
Metal-type cards are reasonably uncommon, and historically havent had enough support to be viable, but recent expansions especially the Celestial Guardians expansion have done wonders for the type
Eddy then took to her social media and posted her son's idea up in a "free stuff" group on Facebook to see if there was any interest, completely unaware of the attention it was about to bring
Pinnacle Starcage also hits cards like map tokens from Get Lost, Agatha's Soul Cauldron from Izzet Vivi, and various other tokens and cheap cards