If the greatest power among creatures you control is 0 or less at that time, no mana is added to your pool. It doesn’t use the stack and can’t be responded to. Selvala’s last ability is a mana ability.Note that effects that reduced its power before it left the battlefield will apply. Selvala, Heart of the Wilds Illustrated by Tyler Jacobson USD Non-foil. If the new creature isn’t on the battlefield as the first ability resolves, use its power when it left the battlefield to determine whether its controller may draw a card.If another creature has the same or higher power than the new creature’s power, no one may draw a card. The new creature’s power is compared to the power of each other creature on the battlefield as the first ability resolves.

: Add X mana in any combination of colors, where X is the greatest power among creatures you control.

Whenever another creature enters the battlefield, its controller may draw a card if its power is greater than each other creature's power.

TYPE Legendary Creature - Elf Scout ABILITY

Selvala heart of the wilds price