You may look at the top card of your library any time.

You may play lands and cast spells from the top of your library. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost.

, Sacrifice ten nonland permanents: Each opponent loses 10 life.

Citadel Gate enters tapped.

As Citadel Gate enters, choose a color other than white.

: Add or one mana of the chosen color.

As Citadel Siege enters, choose Khans or Dragons.

• Khans — At the beginning of combat on your turn, put two +1/+1 counters on target creature you control.

• Dragons — At the beginning of combat on each opponent's turn, tap target creature that player controls.

(: Add .)

Gate to the Citadel enters the battlefield tapped.

, : Seek a nonland card. Activate only once.

Vigilance, ward

: Another target creature you control gains protection from the card type of your choice until end of turn. (It can't be blocked, targeted, dealt damage, enchanted, or equipped by anything of that type.)

Seaside Citadel enters tapped.

: Add , , or .

Sunken Citadel enters tapped. As it enters, choose a color.

: Add one mana of the chosen color.

: Add two mana of the chosen color. Spend this mana only to activate abilities of land sources.

Black legendary creatures you control have "bands with other legendary creatures." (Any legendary creatures can attack in a band as long as at least one has "bands with other legendary creatures." Bands are blocked as a group. If at least two legendary creatures you control, one of which has "bands with other legendary creatures," are blocking or being blocked by the same creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)