Volcanic Torrent (CMR) from Commander Legends, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Grzegorz Rutkowski
• Card Text:
  Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)
  Volcanic Torrent deals X damage to each creature and planeswalker your opponents control, where X is the number of spells you've cast this turn.