Splicer's Skill - MH1 Reprint (PLST) from The List, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Jason Felix
• Card Text:
  Create a 3/3 colorless Golem artifact creature token.
  Splice onto instant or sorcery 3W (As you cast an instant or sorcery spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)