Vapor Snag

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

Phantasmal Dreadmaw

Trample
When this creature becomes the target of a spell or ability, sacrifice it.

Phantasmal Bear

When this creature becomes the target of a spell or ability, sacrifice it.

Annul

Counter target artifact or enchantment spell.

Echoing Truth

Return target nonland permanent and all other permanents with the same name as that permanent to their owners' hands.

Counterspell

Lord of the Unreal

Illusion creatures you control get +1/+1 and have hexproof. (They can't be the targets of spells or abilities your opponents control.)

Phantasmal Image

You may have this creature enter as a copy of any creature on the battlefield, except it's an Illusion in addition to its other types and it has "When this creature becomes the target of a spell or ability, sacrifice it."

Phantasmal Dragon

Flying
When this creature becomes the target of a spell or ability, sacrifice it.

Spell Snare

Peek

Look at target player's hand.
Draw a card.

Serum Visions

Tormod's Crypt

{T}, Sacrifice this artifact: Exile target player's graveyard.

Adaptive Automaton

As this creature enters, choose a creature type.
This creature is the chosen type in addition to its other types.
Other creatures you control of the chosen type get +1/+1.

Island

Mana Leak

Counter target spell unless its controller pays {3}.

Krovikan Mist

Flying
Krovikan Mist's power and toughness are each equal to the number of Illusions on the battlefield.

Impulse

Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.