Silvergill Douser
Lorwyn — common
Creature — Merfolk Wizard
Silvergill Douser rulings:
2007-10-01: A permanent that’s both a Merfolk and a Faerie is counted only once when determining X.
2007-10-01: The value of X is determined when Silvergill Douser’s ability resolves. It won’t change later, even if the number of Merfolk and/or Faeries you control changes.