Gruul Delirium is a creature-based midrange deck leaning on Wildfire Wickerfolk, Patchwork Beastie, and protective tricks like Blossoming Defense, so Slagstorm punishes their board development before they can protect key threats. Ghost Vacuum answers any graveyard recursion angles from Rapid Rescue or Break Out, and Emeritus of Ideation helps you keep pace on cards after trading removal for their threats. Trim Flashback, Improvisation Capstone, and a Sundown Pass since this matchup rewards efficient sweeper effects and removal over card selection. Keep Combustion Technique and Abandon Attachments to pick off their early creatures before Violent Urge or Blossoming Defense can protect them.