The Curve Keeper

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 .)

"I'm Curving!"