He has the right to fight along with the thunder dragons.
[CONT](RC):This unit cannot be retired due to an effect from one of your cards.
[AUTO](RC):[Soul Blast (1)-card with "Eradicator" in its card name] When this unit attacks a vanguard, you may pay the cost. If you do, this unit gets [Power]+1000 for each of all fighter's open (RC) until end of that battle.