Activate only when an effect is activated that would destroy 2 or more cards you control. Negate the effect and destroy that card. Then, you can Special Summon 1 Stardust Dragon from your Extra Deck.
Near Mint Unlimited - $5.60
Lightly Played Unlimited - $5.00
Moderately Played Unlimited - $4.50
Heavily Played Unlimited - $3.40
Damaged Unlimited - $2.30
