Cheapest priced copy (Hour of Devastation): $0.69 at Card Kingdom, near mint, their price list as of .
Ammit Eternal 
Creature — Zombie Crocodile Demon · 5/5 · Rare · Hour of Devastation · #57
Afflict 3 (Whenever this creature becomes blocked, defending player loses 3 life.)
Whenever an opponent casts a spell, put a -1/-1 counter on this creature.
Whenever this creature deals combat damage to a player, remove all -1/-1 counters from it.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.69 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Hour of Devastation | 57 | Rare | $0.69 | $1.49 |
| Hour of Devastation Promos | 57s | Rare | — | $3.49 |
5 rulings from Wizards of the Coast
- 14 July 2017Afflict causes the defending player to lose life; it's not damage or combat damage.
- 14 July 2017Ammit Eternal's middle ability will resolve before the spell that caused it to trigger. The ability will resolve even if that spell is countered.
- 14 July 2017Afflict resolves before combat damage is dealt. If this loss of life brings a player to 0 life or less, that player loses the game immediately. A blocking creature with lifelink won't deal combat damage in time to save that player.
- 14 July 2017If multiple creatures block a creature with afflict, afflict triggers only once.
- 28 July 2023If a creature is attacking a planeswalker, that planeswalker's controller is the defending player. If a creature is attacking a battle, that battle's protector is the defending player.