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 - $2.25
Lightly Played Unlimited - $2.15
Moderately Played Unlimited - $1.90
Heavily Played Unlimited - $1.70
Damaged Unlimited - $1.50