You cannot use 1 of your Spell & Trap Card Zones. During your Draw Phase, if you control another "Mystical Cards of Light", you can draw 2 cards instead of 1 for your normal draw.
Near Mint / Lightly Played Limited - $0.10
Moderately Played Limited - $0.10
Heavily Played Limited - $0.10
Damaged Limited - $0.10
Near Mint / Lightly Played Unlimited - $0.50
Moderately Played Unlimited - $0.50
Heavily Played Unlimited - $0.50
Damaged Unlimited - $0.50
Near Mint / Lightly Played 1st Edition - $0.10
Moderately Played 1st Edition - $0.10
Heavily Played 1st Edition - $0.10
Damaged 1st Edition - $0.10