Until end of turn, your hero gains "Whenever you draw a card this action phase, deal 1 arcane damage to any target". (Brainstorm itself does not have an arcane damage effect. It is not modified by arcane damage modifiers.)
Near Mint - $900
Near Mint Spanish - $900
Lightly Played - $700
Lightly Played Spanish - $700
Moderately Played - $700
Moderately Played Spanish - $700
Heavily Played - $600
Heavily Played Spanish - $600
Damaged - $500
Damaged Spanish - $500