Serendib Efreet

Flying
At the beginning of your upkeep, this creature deals 1 damage to you.

Unsubstantiate

Return target spell or creature to its owner's hand.

Rain of Revelation

Frost Breath

Tap up to two target creatures. Those creatures don't untap during their controller's next untap step.

Capture Sphere

Flash (You may cast this spell any time you could cast an instant.)
Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Island

Roaming Ghostlight

Flying
When this creature enters, return up to one target non-Spirit creature to its owner's hand.

Tide Skimmer

Flying
Whenever you attack with two or more creatures with flying, draw a card.

Keen Glidemaster

{2}{U}: Target creature gains flying until end of turn.

Wall of Runes

Defender (This creature can't attack.)
When this creature enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Windreader Sphinx

Flying
Whenever a creature with flying attacks, you may draw a card.

Lofty Denial

Counter target spell unless its controller pays {1}. If you control a creature with flying, counter that spell unless its controller pays {4} instead.

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.