Have

Yorion, Sky Nomad

Companion — Your starting deck contains at least twenty cards more than the minimum deck size. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.)
Flying
When Yorion enters, exile any number of other nonland permanents you own and control. Return those cards to the battlefield at the beginning of the next end step.

Aerie Mystics

Flying
{1}{G}{U}: Creatures you control gain shroud until end of turn. (They can't be the targets of spells or abilities.)

Obelisk of Bant

Plains

Warden of Evos Isle

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

Palace Familiar

Flying
When this creature dies, draw a card.

Bant Charm

Choose one —
• Destroy target artifact.
• Put target creature on the bottom of its owner's library.
• Counter target instant spell.

Favorable Winds

Creatures you control with flying get +1/+1.

Airborne Aid

Draw a card for each Bird on the battlefield.

Soulcatchers' Aerie

Whenever a Bird is put into your graveyard from the battlefield, put a feather counter on this enchantment.
Bird creatures get +1/+1 for each feather counter on this enchantment.

Talon Trooper

Sky Spirit

Prevent all combat damage that would be dealt this turn.

Soulcatcher

Flying
Whenever a creature with flying dies, put a +1/+1 counter on this creature.

Rally of Wings

Untap all creatures you control. Creatures you control with flying get +2/+2 until end of turn.

Treva's Charm

Choose one —
• Destroy target enchantment.
• Exile target attacking creature.
• Draw a card, then discard a card.

Empyrean Eagle

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

Restless Anchorage

This land enters tapped.
{T}: Add {W} or {U}.
{1}{W}{U}: Until end of turn, this land becomes a 2/3 white and blue Bird creature with flying. It's still a land.
Whenever this land attacks, create a Map token.

Battlefield Raptor

Fable of Wolf and Owl

Whenever you cast a green spell, you may create a 2/2 green Wolf creature token.
Whenever you cast a blue spell, you may create a 1/1 blue Bird creature token with flying.

Crookclaw Elder

Flying
Tap two untapped Birds you control: Draw a card.
Tap two untapped Wizards you control: Target creature gains flying until end of turn.

Tamiyo, Field Researcher

+1: Choose up to two target creatures. Until your next turn, whenever either of those creatures deals combat damage, you draw a card.
−2: Tap up to two target nonland permanents. They don't untap during their controller's next untap step.
−7: Draw three cards. You get an emblem with "You may cast spells from your hand without paying their mana costs."

Forest

Gwaihir the Windlord

This spell costs {2} less to cast as long as you've drawn two or more cards this turn.
Flying, vigilance
Other Birds you control have vigilance.

Owlbear

Trample
Keen Senses — When this creature enters, draw a card.

Gilded Goose

Flying
When this creature enters, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")
{1}{G}, {T}: Create a Food token.
{T}, Sacrifice a Food: Add one mana of any color.

Seaside Haven

{T}: Add {C}.
{W}{U}, {T}, Sacrifice a Bird: Draw a card.

Scouting Hawk

Flying
Keen Sight — When this creature enters, if an opponent controls more lands than you, search your library for a basic Plains card, put it onto the battlefield tapped, then shuffle.

River Hoopoe

Flying
{3}{G}{U}: You gain 2 life and draw a card.

Sky Crier

Flying, lifelink
{3}{W}: You and target opponent each draw a card.

Evolving Wilds

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Rampant Growth

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Island

Seaside Citadel

This land enters tapped.
{T}: Add {G}, {W}, or {U}.

Flurry of Wings

Create X 1/1 white Bird Soldier creature tokens with flying, where X is the number of attacking creatures.

Messenger Falcons

Flying
When this creature enters, draw a card.

Fertile Ground

Enchant land
Whenever enchanted land is tapped for mana, its controller adds an additional one mana of any color.

Arctic Aven

Flying
This creature gets +1/+1 as long as you control a Plains.
{W}: This creature gains lifelink until end of turn. (Damage dealt by this creature also causes you to gain that much life.)