Mono-White Aggro floods the board with small 1- and 2-toughness creatures like Thraben Inspector, Novice Inspector, and Raffine's Informant, so a second Arms of Hadar is a clean sweeper killing most of their board for -2/-2. Okiba-Gang Shinobi punishes their grindy card-advantage plan (Search Party Captain, Salt Road Packbeast drawing cards) by ripping two cards from their hand on connection, slowing their ability to refill. Agony Warp is redundant with our removal suite against their small creatures, and Faerie Seer's scry is too passive against this proactive aggro deck. Keep Snuff Out and Cast Down as efficient, cheap removal for their early threats, and use Counterspell to stop Battle Screech from doubling their board.