Keeper of the Crown (adventurer) [Mystery Booster 2 Playtest Cards]

(L can be paid with one mana from a legendary source.)

Other legendary creatures you control get +1/+1 and have indestructible.

Coronation of the Wilds 2G

Sorcery - Adventure

Target creature you control becomes a legendary Noble in addition to its other types and gains": Add one mana of any color."

Draw a card.