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 - $3.60
Lightly Played Unlimited - $3.20
Moderately Played Unlimited - $2.80
Heavily Played Unlimited - $2.20
Damaged Unlimited - $1.50