Magic The Gathering Cards of types 'Legendary' and 'Gate'

As The Black Gate enters, you may pay 3 life. If you don't, it enters tapped. {T}: Add {B}. {1}{B}, {T}: Choose a player with the most life or tied for most life. Target creature can't be blocked by creatures that player controls this turn.

{T}: Add {C}. {2}, {T}: Add X mana of any one color, where X is the number of other Gates you control.