Breeches, the Blastmaker Ecstatic Electromancer Enthusiastic Mechanaut Fleem, Goben's Creation Gadget Technician Goblin Electromancer Goblin Flectomancer Goblin Test Pilot Goro-Goro and Satoru Green Goblin Mizzix of the Izmagnus Razorfin Hunter Sanar, Innovative First-Year Sanar, Unfinished Genius Stream Hopper
Well, its all about their rarity
this has a small effect on the pull rates as well
you may cast a card with a converted mana cost of four or less from your hand without paying it's mana cost
Overall, the most positive response came from Guarddogbitch who commented Its certainly interesting and I personally dont mind it? Even this positive remark was accompanied by a caveat, however
It's perfect for gringy Golgari, and Jund builds and sacrifice decks that can get additional value from sacring the Dreadknight