Cheapest priced copy (Jumpstart 2022): $0.49 at Card Kingdom, near mint, their price list as of .
Feast on the Fallen 
Enchantment · Uncommon · Magic 2015 · #96
At the beginning of each upkeep, if an opponent lost life last turn, put a +1/+1 counter on target creature you control.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.49 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Jumpstart 2022 | 68 | Uncommon | $0.49 | — |
| Magic 2015 | 96 | Uncommon | $0.59 | $1.99 |
4 rulings from Wizards of the Coast
- 18 July 2014Feast on the Fallen looks at the entire previous turn to determine whether its ability triggers or not. It doesn’t matter whether Feast on the Fallen was on the battlefield when the opponent lost life.
- 18 July 2014Feast on the Fallen checks only if an opponent lost life during the turn, not whether that player’s life total decreased over the course of the turn. For example, if an opponent lost 2 life and then gained 8 life last turn, Feast on the Fallen’s ability will trigger.
- 18 July 2014Damage dealt to an opponent causes that player to lose that much life.
- 18 July 2014Only one +1/+1 counter will be put on the target creature no matter how much life was lost.