Eldrazi can bury the board in colorless mana dorks and Eldrazi Spawn tokens, so Brotherhood's End's 3-damage-to-all-creatures-and-planeswalkers mode wipes Basking Broodscale, Spawn tokens, and small threats cheaply. Empty the Warrens gives a second, resilient storm finisher that dodges single-target removal like Dismember better than an all-in Grapeshot. Artist's Talent and Flashback are cut since they're slower value pieces that don't help race a deck trying to land Emrakul, the Promised End or grind with Kozilek's Command. Keep your core ritual/draw engine intact and prioritize assembling a kill before they stabilize with Devourer of Destiny or Dismember.

Rakdos Delirium builds a graveyard-fueled board with Nethergoyf, Moonshadow, and Stitcher's Supplier, so Brotherhood's End's 3-damage-to-all-creatures mode is strong against their small, delirium-boosted threats. The deck also has aggressive discard (Thoughtseize) and burn (Lightning Bolt), so an extra Grapeshot helps close games fast before they strip your hand or kill Ral, Monsoon Mage. Artist's Talent is too slow against their efficient curve, and Flashback is a lower priority since it's card-disadvantage neutral rather than immediately impactful. Watch for Flare of Malice forcing you to sacrifice your best creature/planeswalker and try to race before their graveyard engines take over.

Esper Control's Silence and Orim's Chant both strip your ability to cast spells on their turn or yours, so Wear // Tear's Tear half (destroy target enchantment for {W}) is a clean, cheap answer if you draw white sources, though it will mostly sit as a sideboard safety valve since you lack much white mana. Empty the Warrens is valuable as a second storm finisher that doesn't die to Supreme Verdict or Wrath of the Skies the way a board of Goblin tokens from a prior Empty would, letting you close the game even after a board wipe resets creatures. Artist's Talent is cut because its level-up cost is clunky against Teferi, Time Raveler and Narset, Parter of Veils, which restrict when you can act, and Wish is trimmed since it's a dead card if the opponent's countermagic (Force of Negation, Spell Snare) is live. Prioritize playing around Solitude and holding extra rituals to go off in one turn past their Narset lock.