Endoskeleton - USG Reprint (PLST) from The List, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Mark Tedin
• Card Text:
  You may choose not to untap Endoskeleton during your untap phase.
  2, T: Target creature gets +0/+3 as long as Endoskeleton remains tapped.