Mono-White Aggro goes wide with cheap creatures (Thraben Inspector, Novice Inspector, Fortress Kin-Guard) and finishes with flying Bird tokens from Battle Screech (and its flashback) and team pumps like Ramosian Rally, so life gain is key to surviving their aggressive curve while we set up. Weather the Storm's storm trigger means it can gain significant life on our own combo turn, directly countering their plan to race us with combat damage. First Day of Class is removed since its +1/+1 counter and haste grant don't meaningfully help us race or block their wide board. This matchup comes down to whether we can stabilize our life total long enough to deploy a lethal storm turn.