Kotsuma Royal Bugeisha

Haste, first strike, lifelink, vigilance
Whenever a legendary permanent enters the battlefield under your control, you may have Kotsuma Royal Bugeisha Call for kin. (Search your library for a card with the same name as this card and put it onto the battlefield. Then shuffle your library.)
Kotsuma Royal Bugeisha gets +1/+1 for each legendary permanent you control.