Gaia Soul the Combustible Collective (DR3-EN088) - Dark Revelation Volume 3 Unlimited

You can tribute up to 2 Pyro-Type Monsters. If you do this, this card gains ATK equal to the number of Tributed monsters x 1000. During battle between this card and a Defense Position monster whose DEF is lower than the ATK of this card, inflict the difference as Battle Damage to your opponent. Destroy this card at the end of this turn.