Must be Special Summoned (from your Extra Deck) by sending the above cards you control to the Graveyard, and cannot be Special Summoned by other ways. (You do not use 'Polymerization'.) This card is unaffected by other card effects. If this card attacks or is attacked, during damage calculation (in either player's turn): You can activate this effect; this card's ATK and DEF each become equal to the ATK of the monster on the field with the highest ATK (your choice, if tied). When this card is destroyed by battle: You can Special Summon 3 'Legendary Knight' monsters from your hand, Deck, or Graveyard, ignoring their Summoning conditions.