Alchemist's Talent (BLC-022) - Bloomburrow Commander

(Gain the next level as a sorcery to add its ability.)
When this Class enters, create two tapped Treasure tokens.
: Level 2
Treasures you control have ", Sacrifice this artifact: Add two mana of any one color."
: Level 3
Whenever you cast a spell, if mana from a Treasure was spent to cast it, this Class deals damage equal to that spell's mana value to each opponent.