What type of card is The Curve Keeper?

Q: What type of card is The Curve Keeper?

The Curve Keeper is a Legendary Creature — Human Soldier. Its oracle text reads: "Creatures you control get +X/+0, where X is the greatest number of consecutive nonland, nontoken permanents in a mana curve you control. (For example, if you have permanents with mana value 3, 4, and 5, creatures you control get+3/+0. If you're missing 4, they only get +1/+0.)"

The Curve Keeper

Legendary Creature — Human Soldier

Creatures you control get +X/+0, where X is the greatest number of consecutive nonland, nontoken permanents in a mana curve you control. (For example, if you have permanents with mana value 3, 4, and 5, creatures you control get+3/+0. If you're missing 4, they only get +1/+0.)

Set Unknown Event

Rarity Rare

Mana Value 6

Collector # RW47

Scryfall