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 - $10.30
Lightly Played Unlimited - $9.30
Moderately Played Unlimited - $8.30
Heavily Played Unlimited - $6.20
Damaged Unlimited - $5.20
