Shadow Burst is a spell for the Dragoncraft class that appears in the Shadowverse anime.
Ability[]
If an allied Soul Blade, Gale Edge, Guardian Wing and Rebirth Wing have been destroyed during this match, change the attack and defense of an allied Extinction Dragon Evolved to 10, then change the attack of all enemy followers to 0. Whenever an allied Extinction Dragon Evolved attacks the enemy leader this turn, restore 10 defense to your leader after damage is dealt.