Thundering Raiju (NEO) from Kamigawa: Neon Dynasty, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Xavier Ribeiro
• Card Text:
  Haste
  Whenever Thundering Raiju attacks, put a +1/+1 counter on target creature you control. Then Thundering Raiju deals X damage to each opponent, where X is the number of modified creatures you control other than Thundering Raiju. (Equipment, Auras you control, and counters are modifications.)