While you have a "Death Dragon" family Spirit in your Trash, this set Burst is unaffected by opposing effects.
☼[ Burst: After Your Life Decreases]
Destroy two opposing Spirits/Ultimates with 3 or less core on them, and you can put a card from your decktop facedown on your Removed Zone. After that effect resolves, summon this card without paying the cost.
[LV2][LV3] (Your Attack Step) While you have at least 5 facedown cards on your Removed Zone, your "Death Dragon" family Spirits can't be blocked.