Platinum Emperion — ruling 1

If a cost would include causing you to gain life (like the alternative cost of an opponent’s Invigorate does), that cost can’t be paid.

Platinum Emperion — ruling 2

Platinum Emperion’s ability doesn’t prevent damage. Rather, it changes the results of that damage. For example, if a creature with lifelink deals damage to you, you won’t lose any life, but its controller will still gain that much life. Similarly, if a creature you control with lifelink deals damage to another player, that player will lose life but you won’t gain any life.

Platinum Emperion — ruling 3

Abilities that trigger whenever damage is dealt to you will still trigger because that damage is still dealt, even though your life total doesn’t change as a result.

Platinum Emperion — ruling 4

Spells and abilities that would normally cause you to gain or lose life still resolve, but the life-gain or life-loss part simply has no effect.

Platinum Emperion — ruling 5

You can’t pay a cost that includes the payment of any amount of life other than 0 life. However, you can choose to be dealt damage, even though that damage won’t result in your life total changing.

Platinum Emperion — ruling 6

Effects that would replace having you gain life with some other event won’t be able to be applied because it’s impossible for you to gain life.

Platinum Emperion — ruling 7

Effects that replace an event with having you gain life (like Words of Worship’s effect does) or having you lose life will end up replacing the event with nothing.

Platinum Emperion — ruling 8

If an effect says to set your life total to a certain number, that part of the effect won’t do anything.

Platinum Emperion : règles, fonctionnement et interactions (MTG)

Platinum Emperion is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Your life total can't change. (You can't gain or lose life. You can't pay any amount of life except 0.)

How it works : Platinum Emperion

Original English text — Wizards of the Coast / Scryfall

#1December 7, 2018· Wizards of the Coast
If a cost would include causing you to gain life (like the alternative cost of an opponent’s Invigorate does), that cost can’t be paid.
No other card is named in this ruling.
#2December 7, 2018· Wizards of the Coast
Platinum Emperion’s ability doesn’t prevent damage. Rather, it changes the results of that damage. For example, if a creature with lifelink deals damage to you, you won’t lose any life, but its controller will still gain that much life. Similarly, if a creature you control with lifelink deals damage to another player, that player will lose life but you won’t gain any life.
No other card is named in this ruling.
#3December 7, 2018· Wizards of the Coast
Abilities that trigger whenever damage is dealt to you will still trigger because that damage is still dealt, even though your life total doesn’t change as a result.
No other card is named in this ruling.
#4December 7, 2018· Wizards of the Coast
Spells and abilities that would normally cause you to gain or lose life still resolve, but the life-gain or life-loss part simply has no effect.
No other card is named in this ruling.
#5December 7, 2018· Wizards of the Coast
You can’t pay a cost that includes the payment of any amount of life other than 0 life. However, you can choose to be dealt damage, even though that damage won’t result in your life total changing.
No other card is named in this ruling.
#6December 7, 2018· Wizards of the Coast
Effects that would replace having you gain life with some other event won’t be able to be applied because it’s impossible for you to gain life.
No other card is named in this ruling.
#7December 7, 2018· Wizards of the Coast
Effects that replace an event with having you gain life (like Words of Worship’s effect does) or having you lose life will end up replacing the event with nothing.
No other card is named in this ruling.
#8December 7, 2018· Wizards of the Coast
If an effect says to set your life total to a certain number, that part of the effect won’t do anything.
No other card is named in this ruling.
#9December 7, 2018· Wizards of the Coast
If an effect would cause you to exchange life totals with another player, the exchange won’t happen. Neither player’s life total changes.
No other card is named in this ruling.
#10December 7, 2018· Wizards of the Coast
In a Commander game, the damage dealt to you by commanders will still be counted, even if that damage doesn’t cause you to lose life.
No other card is named in this ruling.