Sol Ring

Island

Spell Blast

Counter target spell with mana value X. (For example, if that spell's mana cost is {3}{U}{U}, X is 5.)

Millstone

Counterspell

Circle of Protection: Black

{1}: The next time a black source of your choice would deal damage to you this turn, prevent that damage.

Howling Mine

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

Swords to Plowshares

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

Disenchant

Control Magic

Enchant creature
You control enchanted creature.

Plains

Circle of Protection: Green

{1}: The next time a green source of your choice would deal damage to you this turn, prevent that damage.

Unsummon

Return target creature to its owner's hand.

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.

Braingeyser

Circle of Protection: Red

{1}: The next time a red source of your choice would deal damage to you this turn, prevent that damage.