Boros Challenger (Foil) (GRN) from Guilds of Ravnica, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Foil
• Artist: Gabor Szikszai
• Card Text:
  Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)
  2RW: Boros Challenger gets +1/+1 until end of turn.