Heroic Champion - Claivesolish

2 Level 4 Warrior monsters
Monsters your opponent controls cannot target other monsters for attacks. You can pay LP so that you only have 500 left; at the start of the Battle Phase this turn, the ATK of 1 face-up monster you control becomes doubled. When an attack is declared involving an opponent's monster: You can detach 1 material from this card, then target 1 face-up monster your opponent controls; this card gains ATK equal to that monster's, until the end of this turn. You can only use each effect of "Heroic Champion - Claivesolish" once per turn.