60 cards where the text includes “whenever ~ is dealt damage”

Firedrinker Satyr (Theros #122)
Hungering Hydra (Commander 2020 #177)
Jackal Pup (Masters 25 #139)
Wall of Hope (Legions #24)
Broodhatch Nantuko (Murders at Karlov Manor Commander #167)
Feldon, Ronom Excavator (The Brothers' War #135)
Filthy Cur (Odyssey #136)
Flumph (Adventures in the Forgotten Realms #15)
High Priest of Penance (Commander Legends: Battle for Baldur's Gate #848)
Mogg Maniac (Tempest Remastered #147)
Raptor Hatchling (Ixalan #155)
Siegehorn Ceratops (Rivals of Ixalan #171)
Boros Reckoner (Murders at Karlov Manor Commander #201)
Frilled Deathspitter (Rivals of Ixalan #104)
Grollub (Exodus #63)
Hornet Nest (Commander 2021 #192)
Indoraptor, the Perfect Hybrid (Jurassic World Collection #15)
Jagged Poppet (Dissension #115)
Metropolis Reformer (March of the Machine: The Aftermath #4)
Phyrexian Negator (Duel Decks: Phyrexia vs. the Coalition #1)
Phyrexian Totem (Duel Decks: Phyrexia vs. the Coalition #20)
Ranging Raptors (The Lost Caverns of Ixalan Commander #249)
Ravenous Daggertooth (Ixalan #202)
Shinka Gatekeeper (Betrayers of Kamigawa #117)
Sporeweb Weaver (Core Set 2021 #208)
Stalwart Speartail (Alchemy: Ixalan #29)
Barbed Servitor (Murders at Karlov Manor #77)
Cacophodon (Rivals of Ixalan #123)
Deep-Slumber Titan (Shadowmoor #89)
Fungusaur (Eighth Edition #250)
Ill-Tempered Loner // Howlpack Avenger (Innistrad: Crimson Vow #162)
Ill-Tempered Loner // Howlpack Avenger (Innistrad: Crimson Vow #162)
Needletooth Raptor (Rivals of Ixalan #107)
Phyrexian Harvester (Alchemy: Phyrexia #13)
Ripjaw Raptor (The Lost Caverns of Ixalan Commander #253)
Saber Ants (Mercadian Masques #267)
Spitemare (Duel Decks: Ajani vs. Nicol Bolas #16)
Truefire Captain (Ravnica Remastered #235)
Urban Daggertooth (Modern Horizons 2 #181)
Volatile Rig (Return to Ravnica #236)
Body of Knowledge (Commander Legends #59)
Brash Taunter (Murders at Karlov Manor Commander #148)
Dromad Purebred (Ravnica: City of Guilds #15)
Illusory Ambusher (Commander 2020 #113)
Imperial Ceratops (Rivals of Ixalan #10)
Overgrown Armasaur (Rivals of Ixalan #141)
Snapping Sailback (Ixalan #208)
Sprouting Phytohydra (Dissension #95)
Stuffy Doll (Commander Legends: Battle for Baldur's Gate #875)
Thrashing Mudspawn (Onslaught #177)
Trapjaw Tyrant (Rivals of Ixalan #29)
Vrondiss, Rage of Ancients (Forgotten Realms Commander #4)
Zalto, Fire Giant Duke (Adventures in the Forgotten Realms #171)
Bellowing Aegisaur (The Lost Caverns of Ixalan Commander #127)
Coalhauler Swine (Ravnica: City of Guilds #119)
Strong, the Brutish Thespian (Fallout #84)
Sun-Crowned Hunters (Ixalan #164)
Kami of the Honored Dead (Betrayers of Kamigawa #12)
Silverclad Ferocidons (Rivals of Ixalan #115)
Polyraptor (Rivals of Ixalan #144)
Apex Altisaur (The Lost Caverns of Ixalan Commander #232)

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