Gaisen, spirit king

Flying, Shroud
When Gaisen, Spirit King Enters the battlefield,
create 2 2/2 black zombie creature token.
{t}, sacrifice a creature: choose up to one.
•: Add{w}{u}{b}{r}{g}
•: Add {c}{c}{c}{c}{c}{c}
•: Add {s}{s}
{bull}: Create a Legendary black spirit token called
Gaisen's lost soul, it is a 7/7 with shroud