Gaia Dragon, the Thunder Charger (BLLR-EN065)

2 Level 7 monsters

You can also Xyz Summon this card by using a Rank 5 or 6 Xyz Monster you control as material. (Transfer its materials to this card.) If this card attacks a Defense Position monster, inflict piercing battle damage.

Dragon / Xyz / Effect, Battles of Legend: Light's Revenge