Cheapest priced copy (Ultimate Masters): $16.99 at Card Kingdom, near mint, their price list as of .
Platinum Emperion 
Artifact Creature — Golem · 8/8 · Mythic · Scars of Mirrodin · #193
Your life total can't change. (You can't gain or lose life. You can't pay any amount of life except 0.)
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $16.99 to $39.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ultimate Box Topper | U30 | Mythic | — | $34.99 |
| Scars of Mirrodin | 193 | Mythic | $18.99 | $39.99 |
| Ultimate Masters | 233 | Mythic | $16.99 | $27.99 |
10 rulings from Wizards of the Coast
- 7 December 2018Effects 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.
- 7 December 2018If an effect says to set your life total to a certain number, that part of the effect won’t do anything.
- 7 December 2018In 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.
- 7 December 2018Platinum 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.
- 7 December 2018Abilities 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.
- 7 December 2018If an effect would cause you to exchange life totals with another player, the exchange won’t happen. Neither player’s life total changes.
- 7 December 2018You 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.
- 7 December 2018Spells 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.
- 7 December 2018Effects 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.
- 7 December 2018If 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.