Mardu Energy's most dangerous card is Goblin Bombardment, which lets them sacrifice creatures to ping Cauldron Familiar out of the recursion loop or close out games through combat stalls — Erode exiles it at instant speed and also handles Ocelot Pride, which otherwise generates a flood of tokens that race our drain. Thoughtseize comes in to strip Goblin Bombardment or Ragavan before they resolve, since getting ahead on the stack is often more reliable than answering these threats in play. Suncleanser is an underrated trump here: resolving it against Guide of Souls or Ocelot Pride strips their accumulated energy, kneecapping Galvanic Discharge and their damage output simultaneously. Dauthi Voidwalker hedges against their post-board Nihil Spellbombs that would exile Cauldron Familiar out of our recursion loop, and its shadow damage is relevant in a race. We trim Abhorrent Oculus and the undying filler since they die to Galvanic Discharge and don't advance our game plan against this style of aggressive disruption.