Jeskai Control runs very few early creatures but a dense pile of cheap noncreature spells (Divide by Zero, Firebending Lesson, Accumulate Wisdom, It'll Quench Ya!), making Magebane Lizard extremely punishing turn after turn. Pyroclasm has almost no targets here, and Monstrous Rage is risky since Divide by Zero can simply bounce the enchanted creature for a two-for-one. Weathered Runestone also shuts down any flashback-style recursion they might sideboard in. Keep our burn suite to race before Jeskai Revelation or Thor, God of Thunder stabilizes the board.