51 cards where the text includes “whenever you gain life” and it’s not legal in Pauper

Ageless Entity (Commander 2021 #184)
Ajani's Pridemate (Ravnica: Clue Edition #52)
Ajani, Strength of the Pride (Core Set 2020 #2)
Amalia Benavides Aguirre (The Lost Caverns of Ixalan #221)
Archangel of Thune (Double Masters #5)
Attended Healer (Zendikar Rising #6)
A-Vampire Scrivener (Streets of New Capenna #A-98)
Bloodbond Vampire (Jumpstart #209)
Bloodthirsty Aerialist (Commander 2021 #136)
Cleric Class (Adventures in the Forgotten Realms #6)
Cleric of Life's Bond (Zendikar Rising #222)
Cliffhaven Vampire (Oath of the Gatewatch #153)
Cradle of Vitality (Jumpstart #98)
Dawn of Hope (Guilds of Ravnica #8)
Defiant Bloodlord (Commander 2021 #142)
Dina, Soul Steeper (Strixhaven: School of Mages #178)
Drogskol Reaver (Double Masters 2022 #205)
Elenda's Hierophant (The Lost Caverns of Ixalan Commander #71)
Famished Paladin (Rivals of Ixalan #8)
Field-Tested Frying Pan (Tales of Middle-earth Commander #11)
Gideon's Company (War of the Spark #268)
Hallowed Priest (Arena Beginner Set #9)
Heliod, Sun-Crowned (Commander Masters #29)
Karlov of the Ghost Council (Ravnica Remastered #193)
Lich's Mastery (Dominaria #98)
Light of Promise (Core Set 2021 #25)
Lurking Roper (Adventures in the Forgotten Realms #194)
Malakir Familiar (Jumpstart #253)
Nykthos Paragon (Modern Horizons 2 #22)
Oloro, Ageless Ascetic (Commander 2013 #203)
Prize Pig (Tales of Middle-earth Commander #43)
Ratchet, Field Medic // Ratchet, Rescue Racer (Transformers #2)
Ratchet, Field Medic // Ratchet, Rescue Racer (Transformers #2)
Rodolf Duskbringer (Jumpstart 2022 #25)
Sanguine Bond (Commander 2021 #153)
Scion of the Swarm (Zendikar Rising #121)
Searing Meditation (Duel Decks: Ajani vs. Nicol Bolas #27)
Serene Steward (Battle for Zendikar #46)
Sunbond (Born of the Gods #28)
The Archimandrite (The Brothers' War Commander #26)
Treebeard, Gracious Host (Tales of Middle-earth Commander #73)
Trelasarra, Moon Dancer (Adventures in the Forgotten Realms #236)
Trudge Garden (Commander 2021 #69)
Twinblade Paladin (Core Set 2020 #285)
Valentin, Dean of the Vein // Lisette, Dean of the Root (Strixhaven: School of Mages #161)
Valentin, Dean of the Vein // Lisette, Dean of the Root (Strixhaven: School of Mages #161)
Vampire Scrivener (Streets of New Capenna #98)
Veinwitch Coven (Outlaws of Thunder Junction Commander #151)
Vito, Thorn of the Dusk Rose (Core Set 2021 #127)
Vizkopa Guildmage (Iconic Masters #211)
Voice of the Blessed (Innistrad: Crimson Vow #44)
Wall of Limbs (Magic 2015 #121)
Well of Lost Dreams (Commander 2021 #275)

The arc of my blade has carved a path of light to the end of these results.