During your opponent's End Phase: Gain 500 Life Points for each time you took battle damage this turn. When a Number' monster you control is targeted for an attack, except a 'Number C' monster: You can send this card to the Graveyard; negate the attack, then Special Summon from your Extra Deck, 1 'Number C' monster whose name contains the same number as the attacked monster, using the attacked monster as the Xyz Material. (This Special Summon is treated as an Xyz Summon. Xyz Materials attached to it also become Xyz Materials on the Summoned monster.) You can only control 1 'Don Thousand's Throne'.'