Name:Stern Lesson
ManaCost:2 U
Types:Instant
A:SP$ Draw | Defined$ You | NumCards$ 2 | SubAbility$ TrigDiscard | SpellDescription$ Draw two cards, then discard a card. Create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")
SVar:TrigDiscard:DB$ Discard | Defined$ You | NumCards$ 1 | Mode$ TgtChoose | SubAbility$ DBToken
SVar:DBToken:DB$ Token | TokenTapped$ True | TokenScript$ c_a_powerstone
DeckHas:Ability$Token|Discard & Type$Artifact
Oracle:Draw two cards, then discard a card. Create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")
