Hallowed Fountain

({T}: Add {W} or {U}.)
As Hallowed Fountain enters, you may pay 2 life. If you don't, it enters tapped.

Wall of Denial

Defender, flying
Shroud (This creature can't be the target of spells or abilities.)

Glacial Fortress

Glacial Fortress enters tapped unless you control a Plains or an Island.
{T}: Add {W} or {U}.

Supreme Verdict

This spell can't be countered.
Destroy all creatures.

Serum Visions

Fog Bank

Defender, flying
Prevent all combat damage that would be dealt to and dealt by Fog Bank.

Negate

Counterspell

Plains

Island

Vapor Snag

Return target creature to its owner's hand. Its controller loses 1 life.

Sphinx's Revelation

Render Silent

Counter target spell. Its controller can't cast spells this turn.

Aetherling

{U}: Exile Aetherling. Return it to the battlefield under its owner's control at the beginning of the next end step.
{U}: Aetherling can't be blocked this turn.
{1}: Aetherling gets +1/-1 until end of turn.
{1}: Aetherling gets -1/+1 until end of turn.

Mana Leak

Counter target spell unless its controller pays {3}.

Hindering Light

Counter target spell that targets you or a permanent you control.
Draw a card.