Endling [Modern Horizons] Kithkin Rogue Revenant's power and toughness are

Revenant's power and toughness are each equal to the number of creature cards in your graveyard

If it's a Shadow card

Set: Time Spiral Type: Instant Rarity: Common Cost: {U} Buyback {3} (You may pay an additional {3} as you cast this spell

And yea he doth spake: “Let there be Magic

−4: Tibalt

Endling [Modern Horizons] Kithkin Rogue Revenant's power and toughness areSet: Modern Horizons Type: Creature Zombie Shapeshifter Rarity: Rare Cost: {2}{B}{B} {B}: Endling gains menace until end of turn. {B}: Endling gains deathtouch until end of turn. {B}: Endling gains undying until end of turn. (When this creature dies, if it had no +1 +1 counters on it, return it to the battlefield under its owner's control with a +1 +1 counter on it.) {1}: Endling gets +1 1 or 1 +1 until end of turn.