Stratus Walk (ORI) from Magic Origins, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Aaron Miller
• Card Text:
  Enchant creature
  When Stratus Walk enters the battlefield, draw a card.
  Enchanted creature has flying. (It can't be blocked except by creatures with flying or reach.)
  Enchanted creature can block only creatures with flying.