False Cure

Until end of turn, whenever a player gains life, that player loses 2 life for each 1 life they gained.

Diabolic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Wall of Shards

Defender, flying
Cumulative upkeep—An opponent gains 1 life. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

Kavu Predator

Trample
Whenever an opponent gains life, put that many +1/+1 counters on this creature.

Astarion, the Decadent

Deathtouch, lifelink
At the beginning of your end step, choose one —
• Feed — Target opponent loses life equal to the amount of life they lost this turn.
• Friends — You gain life equal to the amount of life you gained this turn.

Plains

Skyshroud Cutter

If you control a Forest, rather than pay this spell's mana cost, you may have each other player gain 5 life.

Rest for the Weary

Target player gains 4 life.
Landfall — If you had a land enter the battlefield under your control this turn, that player gains 8 life instead.

Swamp

Tainted Remedy

If an opponent would gain life, that player loses that much life instead.

Sandsteppe Citadel

This land enters tapped.
{T}: Add {W}, {B}, or {G}.

Alms Beast

Creatures blocking or blocked by this creature have lifelink.

Selesnya Sanctuary

This land enters tapped.
When this land enters, return a land you control to its owner's hand.
{T}: Add {G}{W}.

Ajani Unyielding

+2: Reveal the top three cards of your library. Put all nonland permanent cards revealed this way into your hand and the rest on the bottom of your library in any order.
−2: Exile target creature. Its controller gains life equal to its power.
−9: Put five +1/+1 counters on each creature you control and five loyalty counters on each other planeswalker you control.

Life Burst

Target player gains 4 life, then gains 4 life for each card named Life Burst in each graveyard.

Forest

Indatha Triome

({T}: Add {W}, {B}, or {G}.)
This land enters tapped.
Cycling {3} ({3}, Discard this card: Draw a card.)

Myrkul, Lord of Bones

As long as your life total is less than or equal to half your starting life total, Myrkul has indestructible.
Whenever another nontoken creature you control dies, you may exile it. If you do, create a token that's a copy of that card, except it's an enchantment and loses all other card types.

Orzhov Basilica

This land enters tapped.
When this land enters, return a land you control to its owner's hand.
{T}: Add {W}{B}.