Derek, last of his name

When Derek, last of his name enters the battlefield, create a 0/3 legendary Kramer black ghost token with "as long as Kramer is on the battlefield, spells and abilities that would target Derek, last of his name target Kramer instead"
{b}, sacrifice Kramer : Derek, last of his name gains initiative and "{x}{b}{b} : take control of a creature that costs {x} or less as long as Derek, last of his name is on the battlefield".