Warden of Evos Isle

Flying
Creature spells with flying you cast cost {1} less to cast.

Cloudkin Seer

Flying
When this creature enters, draw a card.

Unsummon

Return target creature to its owner's hand.

Octoprophet

When this creature enters, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Windstorm Drake

Flying
Other creatures you control with flying get +1/+0.

Overflowing Insight

Sleep

Tap all creatures target player controls. Those creatures don't untap during that player's next untap step.

Frilled Sea Serpent

{5}{U}{U}: This creature can't be blocked this turn.

Waterkin Shaman

Whenever a creature you control with flying enters, this creature gets +1/+1 until end of turn.

Island

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.

Windreader Sphinx

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

River's Favor

Enchant creature
Enchanted creature gets +1/+1.

Glint

Target creature you control gets +0/+3 and gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

Soulblade Djinn

Flying
Whenever you cast a noncreature spell, creatures you control get +1/+1 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.)

Waterknot

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

Winged Words

This spell costs {1} less to cast if you control a creature with flying.
Draw two cards.