Naya Delirium is a creature-based aggro-midrange deck full of delirium payoffs like Wildfire Wickerfolk and Fear of Missing Out, so Sheltered by Ghosts is excellent removal, exiling their best threat (like Patchwork Beastie once delirium is online, or Wildfire Wickerfolk) while giving your creature lifelink and ward 2 to stabilize. Skateboard adds a cheap way to tap down a blocker and push through extra damage in a creature standoff. Cut Hellcat and both copies of Spider Manifestation since they're outclassed in raw stats by Naya's 3/2-3/3 creature base, and trim Seam Rip since it can only target permanents with mana value 2 or less and Sheltered by Ghosts offers broader exile coverage. Watch for their sideboarded Pyroclasm — sequence your +1/+1 counters on your small creatures (Badgermole Cub, Pawpatch Recruit) carefully to avoid a 2-for-one.