40 cards where the card is tagged “block-additional”

Act of Heroism (Masters 25 #1)
Anurid Swarmsnapper (Judgment #105)
Avatar of Hope (Eighth Edition #4)
Blaze of Glory (Masters Edition IV #7)
Brave the Sands (Commander Anthology Volume II #19)
Cenn's Tactician (Morningtide #5)
Coastline Chimera (Theros #44)
Echo Circlet (Scars of Mirrodin #153)
Entangler (Prophecy #7)
Entourage of Trest (Commander Masters #285)
Foriysian Brigade (Weatherlight #14)
Foriysian Interceptor (Time Spiral #18)
Foriysian Totem (Time Spiral #254)
Ghastbark Twins (Core Set 2019 #181)
Give No Ground (Eldritch Moon #29)
Guardian of the Gateless (Conspiracy: Take the Crown #89)
High Ground (Tenth Edition #20)
Hundred-Handed One (Conspiracy: Take the Crown #93)
Iona's Blessing (Oath of the Gatewatch #21)
Ironfist Crusher (Onslaught #42)
Kemba's Legion (Mirrodin Besieged #9)
Knight of Sorrows (Ravnica Allegiance #14)
Lairwatch Giant (Lorwyn #29)
Luminous Guardian (Odyssey #31)
Mounted Archers (Tempest Remastered #19)
Night Market Guard (Battlebond #242)
Palace Guard (Magic 2011 #24)
Selesnya Sagittars (Ravnica: City of Guilds #229)
Spike-Tailed Ceratops (Ixalan #209)
Tangleclaw Werewolf // Fibrous Entangler (Eldritch Moon #174)
Tangleclaw Werewolf // Fibrous Entangler (Eldritch Moon #174)
Thoughtweft Trio (Lorwyn #44)
Trueheart Duelist (Amonkhet #35)
Two-Headed Dragon (Archenemy #50)
Two-Headed Giant of Foriys (Masters Edition IV #139)
Two-Headed Giant of Foriys Avatar (Magic Online Avatars #36)
Valor Made Real (Conspiracy #86)
Vanguard's Shield (Avacyn Restored #223)
Wall of Glare (Urza's Destiny #25)
Watcher in the Web (Shadows over Innistrad #239)
Yare (Mirage #48)

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