Thermo-Alchemist For many years, Thermo-Alchemist was a centerpiece of burn Pauper decks where chaining instants and sorceries was a reliable way to win games once you get to untap with this creature
While not allowing cards that produce two or more mana in the format seems like a good and reasonable rule, the rule isn't really worth much of anything unless it's enforced consistently
Optimus Prime, Autobot Leader Color Indicator: White, Blue, and Red Legendary Artifact Vehicle Living metal (During your turn, this Vehicle is also a creature.) Trample Whenever you attack, bolster 2
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Aside from keyword "big" however, Fiend Artisan does have quite the activated ability too: "X B/G, tap, Sacrifice another creature: Search your library for a creature card with converted mana cost X or less, put it onto the battlefield, then shuffle your library
1 Pyrotechnics
