Gadwick, the Wizened

When Gadwick enters, draw X cards.
Whenever you cast a blue spell, tap target nonland permanent an opponent controls.

Archaeomancer

When this creature enters, return target instant or sorcery card from your graveyard to your hand.

Chart a Course

Draw two cards. Then discard a card unless you attacked this turn.

Geistwave

Return target nonland permanent to its owner's hand. If you controlled that permanent, draw a card.

Serpentine Ambush

Until end of turn, target creature becomes a blue Serpent with base power and toughness 5/5.

Cloudkin Seer

Flying
When this creature enters, draw a card.

Cyclone Summoner

When this creature enters, if you cast it from your hand, return all permanents to their owners' hands except for Giants, Wizards, and lands.

Frost Trickster

Flying
When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.

Chilling Trap

Target creature gets -4/-0 until end of turn. If you control a Wizard, draw a card.

Quicksilver Fisher

Flying
When this creature enters, draw a card, then discard a card.

Thriving Isle

This land enters tapped. As it enters, choose a color other than blue.
{T}: Add {U} or one mana of the chosen color.

Island

Vedalken Mesmerist

Whenever this creature attacks, target creature an opponent controls gets -2/-0 until end of turn.

Charmed Sleep

Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Academy Journeymage

This spell costs {1} less to cast if you control a Wizard.
When this creature enters, return target creature an opponent controls to its owner's hand.