Spell Blast

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

Ornithopter

Phantom Monster

Jayemdae Tome

Unsummon

Return target creature to its owner's hand.

Island

Crystal Rod

Whenever a player casts a blue spell, you may pay {1}. If you do, you gain 1 life.

Air Elemental

Millstone

Creature Bond

Enchant creature
When enchanted creature dies, Creature Bond deals damage equal to that creature's toughness to the creature's controller.

Counterspell

Brass Man

Brass Man doesn't untap during your untap step.
At the beginning of your upkeep, you may pay {1}. If you do, untap Brass Man.

Sage of Lat-Nam

Blue Elemental Blast

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

Giant Tortoise

Giant Tortoise gets +0/+3 as long as it's untapped.

Control Magic

Enchant creature
You control enchanted creature.

Primal Clay

As Primal Clay enters, it becomes your choice of a 3/3 artifact creature, a 2/2 artifact creature with flying, or a 1/6 Wall artifact creature with defender in addition to its other types. (A creature with defender can't attack.)

Steal Artifact

Enchant artifact
You control enchanted artifact.

Phantasmal Forces

Flying
At the beginning of your upkeep, sacrifice Phantasmal Forces unless you pay {U}.

Psychic Venom

Enchant land
Whenever enchanted land becomes tapped, Psychic Venom deals 2 damage to that land's controller.

Prodigal Sorcerer

{T}: Prodigal Sorcerer deals 1 damage to any target.

Reconstruction

Return target artifact card from your graveyard to your hand.

Twiddle

You may tap or untap target artifact, creature, or land.

Sleight of Mind

Change the text of target spell or permanent by replacing all instances of one color word with another. (For example, you may change "target black spell" to "target blue spell." This effect lasts indefinitely.)

Clone

You may have Clone enter as a copy of any creature on the battlefield.

Old Man of the Sea

You may choose not to untap Old Man of the Sea during your untap step.
{T}: Gain control of target creature with power less than or equal to Old Man of the Sea's power for as long as Old Man of the Sea remains tapped and that creature's power remains less than or equal to Old Man of the Sea's power.

Sea Serpent

Sea Serpent can't attack unless defending player controls an Island.
When you control no Islands, sacrifice Sea Serpent.