Diamond Mare

As this creature enters, choose a color.
Whenever you cast a spell of the chosen color, you gain 1 life.

Befuddle

Target creature gets -4/-0 until end of turn.
Draw a card.

Arcane Encyclopedia

Divination

Meteor Golem

When this creature enters, destroy target nonland permanent an opponent controls.

Gearsmith Guardian

This creature gets +2/+0 as long as you control a blue creature.

Aven Wind Mage

Flying
Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn.

Field Creeper

Tempest Djinn

Flying
This creature gets +1/+0 for each basic Island you control.

Riddlemaster Sphinx

Flying (This creature can't be blocked except by creatures with flying or reach.)
When this creature enters, you may return target creature an opponent controls to its owner's hand.

Sai, Master Thopterist

Whenever you cast an artifact spell, create a 1/1 colorless Thopter artifact creature token with flying.
{1}{U}, Sacrifice two artifacts: Draw a card.

Waterknot

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

Disperse

Return target nonland permanent to its owner's hand.

Island

Air Elemental

Zahid, Djinn of the Lamp

You may pay {3}{U} and tap an untapped artifact you control rather than pay this spell's mana cost.
Flying

Scholar of Stars

When this creature enters, if you control an artifact, draw a card.

Gearsmith Prodigy

This creature gets +1/+0 as long as you control an artifact.

Gilded Sentinel

Aviation Pioneer

When this creature enters, create a 1/1 colorless Thopter artifact creature token with flying.