Mardu Energy curves out aggressively with Ragavan, Guide of Souls, and Ocelot Pride, then threatens to convert any board presence into damage through Goblin Bombardment — prioritize keeping their battlefield clear rather than going shields-down. Unholy Heat is your best removal here, efficiently answering Ragavan, Ajani, and Sephiroth once delirium is active, while Consign to Memory can counter Goblin Bombardment's activated ability to disrupt their sacrifice engine and stall their damage clock. Mishra's Bauble is trimmed because each copy hands Orcish Bowmasters a free trigger on your delayed draw, and the card is low-impact when you need density in a race. Expressive Iteration and Violent Urge come out as the slowest spells in your deck — Iteration at sorcery speed is a liability when they're threatening Thoughtseize post-board, and Violent Urge underperforms compared to Mutagenic Growth when they can block or sacrifice into Goblin Bombardment. Dragon's Rage Channeler becomes your most resilient threat in this matchup: at 3/3 with delirium it survives Wrath of the Skies, so prioritize enabling delirium early and protect it with Into the Flood Maw if needed.