Experiment Five - No Symbol (CMB2) from Mystery Booster Playtest Cards 2021, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Gavin Verhey
• Card Text:
  1 Z: Put a +1/+2 counter on CARDNAME. ((Z) is paid with one mana from any source that could produce two or more colors of mana.)