Selvala, Heart of the Wilds

Selvala, Heart of the Wilds

Legendary Creature - Elf Scout | Power/Toughness: 2 / 3 (CMC 3)
Whenever another creature enters the battlefield, its controller may draw a card if its power is greater than each other creature's power.
, {T}: Add X mana in any combination of colors, where X is the greatest power among creatures you control.