Crimson Glow Valstrax

Flying
{t}{x}{b}{r}- Exile Crimson Glow Valstrax with
8 - X charge counters (minimum of one). At the
start of your upkeep remove one charge counter
from Crimson Glow Valstrax. Then, if there is
no charge counters on Crimson Glow Valstrax.
Return it to the battlefield under your control,
it deals 10 damage to each creature without
flying