Rakdos Delirium is mostly creatures, so Force of Negation, which can't hit creature spells, is a lower-impact card to trim here, though it can still answer Thoughtseize, Lightning Bolt, and Flare of Malice. Clarion Conqueror is a 3/3 flier that blocks their small creatures well, and it shuts off the activated abilities of artifacts, creatures, and planeswalkers, which locks out Mishra's Bauble and Nihil Spellbomb (and Ashiok, Dream Render if they bring it in). Be aware that it is not safe from their removal: Lightning Bolt deals 3 damage and kills it outright, and it would also die to our own Brotherhood's End. Brotherhood's End deals 3 damage to each creature and each planeswalker, sweeping Stitcher's Supplier, Orcish Bowmasters, Fear of Missing Out, and Detective's Phoenix's base body cleanly. Sink into Stupor and a Curator of Mysteries come out as too passive against this aggressive graveyard-fueled deck.