Stardust Dragon

Synchro —You may cast this spell without paying its mana cost by sacrificing two or more nontoken creatures under your control whose total mana cost equals 8.

Flying, Vigilance

Sacrifice Stardust Dragon: Counter target spell if it would destroy a permanent. Return Stardust Dragon from the graveyard to the battlefield at the beginning of the next end step.

This dragon selflessly shields its allies from harm.