Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.) When Knight of the Mists enters the battlefield, you may pay {U}. If you don't, destroy target Knight and it can't be regenerated.
![Knight of the Mists (Paul McCabe) (SB) [World Championship Decks 1997]](http://paradoxtcg.com/cdn/shop/products/8916535a-29ca-5785-a425-0122baa2d13a.jpg?v=1702331498&width=1445)
