Simian Grunts (ULG) from Urza's Legacy, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Pete Venters
• Card Text:
  Echo (During your next upkeep after this permanent comes under your control, pay its casting cost or sacrifice it.)
  You may play Simian Grunts any time you could play an instant.