Devoted Combo wants to chain Devoted Druid's untap ability with Vizier of Remedies to generate infinite green mana, then dump it through Craterhoof Behemoth or Agatha's Soul Cauldron; Engineered Explosives set to one or two is a strong proactive answer that can clear Devoted Druid, Vizier of Remedies, Delighted Halfling, or Badgermole Cub before the engine comes online. Tormod's Crypt can preempt any Agatha's Soul Cauldron graveyard shenanigans and strip value from their one-ofs in the graveyard. Stern Scolding actually lines up well against Devoted Druid (0/2) and Delighted Halfling (1/2), both under the power/toughness 2 threshold, so consider keeping it if you expect a grindy game, but Explosives covers multiple targets at once and is the higher-upside swap given your limited sideboard slots. Trim the slowest cantrips and Beyeen Veil, which does nothing against their mana-dork-based combo, to make room.