Counterspell

Blue Elemental Blast

Choose one —
• Counter target red spell.
• Destroy target red permanent.

Mana Short

Tap all lands target player controls and that player loses all unspent mana.

Kismet

Artifacts, creatures, and lands your opponents control enter tapped.

White Knight

First strike (This creature deals combat damage before creatures without first strike.)
Protection from black (This creature can't be blocked, targeted, dealt damage, or enchanted by anything black.)

Tormod's Crypt

{T}, Sacrifice Tormod's Crypt: Exile target player's graveyard.

Serendib Efreet

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

Wrath of God

Destroy all creatures. They can't be regenerated.

Mishra's Factory

{T}: Add {C}.
{1}: Mishra's Factory becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.
{T}: Target Assembly-Worker creature gets +1/+1 until end of turn.

Power Sink

Counter target spell unless its controller pays {X}. If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana.

Swords to Plowshares

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

Plains

Relic Barrier

Strip Mine

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

Chaos Orb

{1}, {T}: If Chaos Orb is on the battlefield, flip Chaos Orb onto the battlefield from a height of at least one foot. If Chaos Orb turns over completely at least once during the flip, destroy all nontoken permanents it touches. Then destroy Chaos Orb.

Sol Ring

City of Brass

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

Disenchant

Island

Flash Counter

Winter Orb

As long as Winter Orb is untapped, players can't untap more than one land during their untap steps.

Serra Angel

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

Howling Mine

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.