Delaying Shield

If damage would be dealt to you, put that many delay counters on this enchantment instead.
At the beginning of your upkeep, remove all delay counters from this enchantment. For each delay counter removed this way, you lose 1 life unless you pay {1}{W}.

Repay in Kind

Each player's life total becomes the lowest life total among all players.

Wall of Blood

Defender (This creature can't attack.)
Pay 1 life: This creature gets +1/+1 until end of turn.

False Cure

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

Arcbound Worker

Modular 1 (This creature enters with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Stunning Reversal

The next time you would lose the game this turn, instead draw seven cards and your life total becomes 1.
Exile Stunning Reversal.