40 cards where (the text includes “destroy” and the text includes “creature”) and the card types include “instant” and the colors ≥ W and it’s legal in Penny Dreadful

Afterlife (Commander 2014 #64)
Avenging Arrow (Return to Ravnica #4)
Bant Charm (Double Masters 2022 #181)
Bright Reprisal (Game Night #9)
Brokers Charm (Streets of New Capenna #171)
Chastise (Ninth Edition #9)
Collar the Culprit (Guilds of Ravnica #5)
Divine Verdict (Rivals of Ixalan #5)
Eightfold Maze (Masters Edition III #9)
Enduring Victory (Dragons of Tarkir #16)
Fated Retribution (Born of the Gods #11)
Fight to the Death (Alara Reborn #97)
Final Payment (Ravnica Allegiance #171)
Giant Killer // Chop Down (Throne of Eldraine #14)
Hope Charm (Visions #8)
Inquisitor's Snare (Shadowmoor #8)
Just Fate (Masters Edition IV #16)
Kill Shot (Streets of New Capenna #19)
Make Your Move (Murders at Karlov Manor #22)
Neck Snap (Lorwyn #32)
Obscura Charm (Streets of New Capenna #208)
Orzhov Charm (Gatecrash #185)
Pitfall Trap (Modern Masters 2017 #18)
Puncturing Light (Shadows over Innistrad #35)
Purge (Duel Decks: Mirrodin Pure vs. New Phyrexia #28)
Radiant's Judgment (Dominaria Remastered #21)
Rebuke (Battlebond #103)
Reprisal (Journey into Nyx #23)
Retaliate (Fifth Dawn #13)
Ride Down (Eldritch Moon #188)
Searing Light (Oath of the Gatewatch #33)
Seed Spark (Ravnica: City of Guilds #30)
Skywhaler's Shot (Commander Legends #46)
Smite (Tempest Remastered #28)
Smite the Monstrous (Zendikar Rising #42)
Strip Bare (Shadowmoor #24)
Stroke of Midnight (Wilds of Eldraine #33)
Sungold Barrage (Innistrad: Midnight Hunt #36)
Terashi's Verdict (Betrayers of Kamigawa #27)
Triumphant Surge (Theros Beyond Death #41)

The message was clear to Sorin—time to search for something else.