Losheel, Clockwork Scholar (CMM) from Commander Masters, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Daniel Zrom
• Card Text:
  Prevent all combat damage that would be dealt to attacking artifact creatures you control.
  Whenever one or more artifact creatures enter the battlefield under your control, draw a card. This ability triggers only once each turn.