Fog Bank

Defender (This creature can't attack.)
Flying
Prevent all combat damage that would be dealt to and dealt by this creature.

Dancing Scimitar

Flying (This creature can't be blocked except by creatures with flying or reach.)

Thran Dynamo

Sol Ring

Mana Leak

Counter target spell unless its controller pays {3}.

Distorting Wake

Return X target nonland permanents to their owners' hands.

Rewind

Counter target spell. Untap up to four lands.

Island

High Tide

Until end of turn, whenever a player taps an Island for mana, that player adds an additional {U}.

Bösium Strip

{3}, {T}: Until end of turn, you may cast instant and sorcery spells from the top of your graveyard. If a spell cast this way would be put into a graveyard, exile it instead.

Accumulated Knowledge

Draw a card, then draw cards equal to the number of cards named Accumulated Knowledge in all graveyards.

Forbid

Buyback—Discard two cards. (You may discard two cards in addition to any other costs as you cast this spell. If you do, put this card into your hand as it resolves.)
Counter target spell.

Mystical Tutor

Search your library for an instant or sorcery card, reveal it, then shuffle and put that card on top.