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 - $1.40
Lightly Played Unlimited - $1.30
Moderately Played Unlimited - $1.10
Heavily Played Unlimited - $0.70
Damaged Unlimited - $0.60