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 - $2.10
Lightly Played Unlimited - $1.80
Moderately Played Unlimited - $1.60
Heavily Played Unlimited - $1.30
Damaged Unlimited - $1.00