Krystal Avatar (MVP1-EN011) - The Dark Side of Dimensions Movie Pack Unlimited

When an opponent's monster declares a direct attack, if its ATK is greater than or equal to your LP: Special Summon this card in Attack Position as an Effect Monster (Warrior-Type/LIGHT/Level 4/ATK ?/DEF 0) that has ATK equal to your LP, then change the attack target to this card. (This card is also still a Trap Card.) If this card Summoned this way is destroyed by battle, after damage calculation: Inflict damage to your opponent equal to its ATK.