Frost and Flame Dragon [TAEV-EN033] Secret Rare Dragon by Tributing 1 Thunder Effect

by Tributing 1 Thunder Effect non-Fusion Monster (in which case you do not use "Polymerization")

this card gains ATK and DEF equal to the difference in Life Points

and any battle damage you received from the battle is also inflicted to your opponent's Life Points

then if its ATK has been reduced to 0 as a result

Frost and Flame Dragon [TAEV-EN033] Secret Rare Dragon by Tributing 1 Thunder EffectSet: Tactical Evolution Card type: Effect Monster Rarity: Secret Rare Attack: 2300 Defense: 2000 This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by removing from play 1 FIRE and 2 WATER monsters from your Graveyard. Once per turn, you can discard 1 card to destroy 1 monster on the field.