Revenant 

Creature - Spirit
It eats death and drinks pain.
Power/Toughness:
0/0Artist:
Andrew GoldhawkShare:
Text:
FlyingRevenant's power and toughness are each equal to the number of creature cards in your graveyard.
Rulings:
- 6/22/2015 The ability that defines Revenant’s power and toughness applies in all zones, not just the battlefield. If Revenant is in your graveyard, its ability will count itself.
Legality:
- standard: Not legal
- future: Not legal
- frontier: Legal
- modern: Legal
- legacy: Legal
- pauper: Not legal
- vintage: Legal
- penny: Legal
- commander: Legal
- 1v1: Legal
- duel: Legal
- brawl: Not legal
- oldschool: Not legal
- historic: Not legal
- pioneer: Legal
- gladiator: Not legal
- premodern: Legal
- historicbrawl: Not legal
- paupercommander: Not legal
- alchemy: Not legal
- explorer: Not legal
- predh: Legal
- oathbreaker: Legal
Sets:
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Magic Online Promos #32192 (rare)
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Magic Origins #117 (uncommon)
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Tempest Remastered #114 (uncommon)
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Prerelease Events #2 (rare)
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Seventh Edition #160 (rare)
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Stronghold #68 (rare)
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Mystery Booster #756 (uncommon)
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Commander Legends #147 (uncommon)
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Stronghold Promos #68 (rare)
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Jumpstart 2022 #461 (uncommon)