City of Brass

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

Balance

Each player chooses a number of lands they control equal to the number of lands controlled by the player who controls the fewest, then sacrifices the rest. Players discard cards and sacrifice creatures the same way.

Tundra

Strip Mine

{T}: Add {C}.
{T}, Sacrifice Strip Mine: Destroy target land.

Plains

Counterspell

Serra Angel

Flying
Vigilance (Attacking doesn't cause this creature to tap.)

Armageddon

Icy Manipulator

{1}, {T}: Tap target artifact, creature, or land.

Control Magic

Enchant creature
You control enchanted creature.

Disenchant

Sol Ring

Phantasmal Forces

Flying
At the beginning of your upkeep, sacrifice Phantasmal Forces unless you pay {U}.

Swords to Plowshares

Exile target creature. Its controller gains life equal to its power.

Island

Air Elemental

Serendib Efreet

Flying
At the beginning of your upkeep, Serendib Efreet deals 1 damage to you.