Gaining life does nothing by itself. These turn it into cards, counters, damage, or a win — which is what makes a lifegain deck a deck.
90%Blood Artist Creature — VampireWhenever this creature or another creature dies, target player loses 1 life and you gain 1 life.$3.77
91%Zulaport Cutthroat Creature — Human Rogue AllyWhenever this creature or another creature you control dies, each opponent loses 1 life and you gain 1 life.$1.23
90%Gray Merchant of Asphodel Creature — ZombieWhen this creature enters, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost thi$4.34
90%Basilisk Collar Artifact — EquipmentEquipped creature has deathtouch and lifelink. (Any amount of damage it deals to a creature is enough to destroy it. Damage dealt $5.48
83%Exsanguinate SorceryEach opponent loses X life. You gain life equal to the life lost this way.$0.38
85%Authority of the Consuls EnchantmentCreatures your opponents control enter tapped. Whenever a creature an opponent controls enters, you gain 1 life.$4.50
88%Bastion of Remembrance EnchantmentWhen this enchantment enters, create a 1/1 white Human Soldier creature token. Whenever a creature you control dies, each opponent$0.34
91%Aetherflux Reservoir ArtifactWhenever you cast a spell, you gain 1 life for each spell you've cast this turn. Pay 50 life: This artifact deals 50 damage to any$22.25
83%Sheoldred, the Apocalypse Legendary Creature — Phyrexian PraetorDeathtouch Whenever you draw a card, you gain 2 life. Whenever an opponent draws a card, they lose 2 life.$100.88
87%Vito, Thorn of the Dusk Rose Legendary Creature — Vampire ClericWhenever you gain life, target opponent loses that much life. {3}{B}{B}: Creatures you control gain lifelink until end of turn.$11.98
86%Blind Obedience EnchantmentExtort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.) Artifact$5.79
83%Sanguine Bond EnchantmentWhenever you gain life, target opponent loses that much life.$7.84
83%The Meathook Massacre Legendary EnchantmentWhen The Meathook Massacre enters, each creature gets -X/-X until end of turn. Whenever a creature you control dies, each opponent$25.20
84%Exquisite Blood EnchantmentWhenever an opponent loses life, you gain that much life.$38.46
90%Crypt Ghast Creature — SpiritExtort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.) Whenever$17.30
89%Bontu's Monument Legendary ArtifactBlack creature spells you cast cost {1} less to cast. Whenever you cast a creature spell, each opponent loses 1 life and you gain $4.44
82%Archivist of Oghma Creature — Halfling ClericFlash Whenever an opponent searches their library, you gain 1 life and draw a card.$6.53
82%Enduring Tenacity Enchantment Creature — Snake GlimmerWhenever you gain life, target opponent loses that much life. When Enduring Tenacity dies, if it was a creature, return it to the $12.99
80%Bloodthirsty Conqueror Creature — Vampire KnightFlying, deathtouch Whenever an opponent loses life, you gain that much life. (Damage causes loss of life.)$38.89
82%Nadier's Nightblade Creature — Elf WarriorWhenever a token you control leaves the battlefield, each opponent loses 1 life and you gain 1 life.$0.42
85%Ayara, First of Locthwain Legendary Creature — Elf NobleWhenever Ayara or another black creature you control enters, each opponent loses 1 life and you gain 1 life. {T}, Sacrifice anothe$9.14
82%Forsaken Monument Legendary ArtifactColorless creatures you control get +2/+2. Whenever you tap a permanent for {C}, add an additional {C}. Whenever you cast a colorl$5.82
84%The Wind Crystal Legendary ArtifactWhite spells you cast cost {1} less to cast. If you would gain life, you gain twice that much life instead. {4}{W}{W}, {T}: Creatu$6.93
86%Cruel Celebrant Creature — VampireWhenever this creature or another creature or planeswalker you control dies, each opponent loses 1 life and you gain 1 life.$3.14
83%Alhammarret's Archive Legendary ArtifactIf you would gain life, you gain twice that much life instead. If you would draw a card except the first one you draw in each of y$10.47
83%Kardur, Doomscourge Legendary Creature — Demon BerserkerWhen Kardur enters, until your next turn, creatures your opponents control attack each combat if able and attack a player other th$3.70
80%Moldervine Reclamation EnchantmentWhenever a creature you control dies, you gain 1 life and draw a card.$0.34
87%Serra Ascendant Creature — Human MonkLifelink (Damage dealt by this creature also causes you to gain that much life.) As long as you have 30 or more life, this creatur$29.12
93%Heliod, Sun-Crowned Legendary Enchantment Creature — GodIndestructible As long as your devotion to white is less than five, Heliod isn't a creature. Whenever you gain life, put a +1/+1 c$21.51
87%Ocelot Pride Creature — CatFirst strike, lifelink Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) At th$42.09
Prices and legality come from Scryfall. Every card here was scored by the same search that runs when you type a question.
