Observant Alseid (THS) from Theros, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Todd Lockwood
• Card Text:
  Bestow {4}{W} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)
  Vigilance
  Enchanted creature gets +2/+2 and has vigilance.