Nykthos, Shrine to Nyx

: Add .
, : Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

Artisan’s Sorrow

Destroy target artifact or enchantment. Scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Shrivel

All creatures get -1/-1 until end of turn.

City of Brass

Whenever City of Brass becomes tapped, it deals 1 damage to you.
: Add one mana of any color.

Essence Backlash

Counter target creature spell. Essence Backlash deals damage equal to that spell’s power to its controller.

Chromatic Lantern

Lands you control have “: Add one mana of any color.”
: Add one mana of any color.

Hallowed Fountain

(: Add or .)
As Hallowed Fountain enters the battlefield, you may pay 2 life. If you don’t, it enters the battlefield tapped.

Civic Saber

Equipped creature gets +1/+0 for each of its colors.
Equip

Malignus

Malignus’s power and toughness are each equal to half the highest life total among your opponents, rounded up.
Damage that would be dealt by Malignus can’t be prevented.

Tracker’s Instincts

Reveal the top four cards of your library. Put a creature card from among them into your hand and the rest into your graveyard.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)