Selvala, Heart of the Wilds (Commander Masters)

Whenever another creature enters, its controller may draw a card if its power is greater than each other creature's power. {G}, {T}: Add X mana in any combination of colors, where X is the greatest power among creatures you control.

NM - $7.50
LP - $6.00
MP - $4.50
HP - $3.00
DMG - $2.00