Kamahl's Will (CMR) from Commander Legends, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Nicholas Gregory
• Card Text:
  Choose one. If you control a commander as you cast this spell, you may choose both.
  • Until end of turn, any number of target lands you control become 1/1 Elemental creatures with vigilance, indestructible, and haste. They're still lands.
  • Choose target creature you don't control. Each creature you control deals damage equal to its power to that creature.