Cheapest priced copy (The List): $0.39 at Card Kingdom, near mint, their price list as of .
Savage Gorger 
Creature — Vampire · 1/1 · Common · Core Set 2020 · #291
Flying
At the beginning of your end step, if an opponent lost life this turn, put a +1/+1 counter on this creature. (Damage causes loss of life.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
2 printings · $0.39 to $0.69 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Core Set 2020 | 291 | Common | $0.69 | — |
| The List | M20-291 | Common | $0.39 | — |
3 rulings from Wizards of the Coast
- 12 July 2019Savage Gorger looks at your entire turn to determine whether an opponent lost any life. It doesn’t matter how many opponents lost life or how much life they lost, only whether any of them did. It also doesn’t matter whether Savage Gorger was on the battlefield when they lost life.
- 12 July 2019It doesn’t matter whether an opponent has less life than they started the turn with. If a player lost 4 life but also gained 6 life, that player still lost 4 life.
- 12 July 2019A player loses life if they pay life.