Whenever Xerex Squire attacks, calculate the hypotenuse of another creature you control. Xerex Squire\'s power and toughness become equal to that number, rounded up, until end of turn. (To calculate a hypotenuse, let A be that creature\'s power and B be that creature\'s toughness. Then C=v(a+b). C is the hypotenuse. Or just look up a calculator online.)