Cast this spell only during the declare attackers step and only if you've been attacked this step.
Creatures you control gain reach until end of turn. (They can block creatures with flying.)

Treetop Rangers can't be blocked except by creatures with flying.

Treetop Scout can't be blocked except by creatures with flying.

Flying, protection from green

Tremor deals 1 damage to each creature without flying.

Flying
Prevent all damage that would be dealt to Tresserhorn Skyknight by creatures with first strike.

Defender
Reach (This creature can block creatures with flying.)
: Regenerate Trestle Troll.

Flying
Whenever Treva, the Renewer deals combat damage to a player, you may pay . If you do, choose a color, then you gain 1 life for each permanent of that color.

Tribal Golem has trample as long as you control a Beast, haste as long as you control a Goblin, first strike as long as you control a Soldier, flying as long as you control a Wizard, and ": Regenerate Tribal Golem" as long as you control a Zombie.

Choose one —
• Target creature gains flying until end of turn.
• Target creature becomes the creature type of your choice until end of turn.
• Look at the top four cards of your library, then put them back in any order.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
Create three 1/1 white Spirit creature tokens with flying. (They can't be blocked except by creatures with flying or reach.)

Flying
Triskelavus enters the battlefield with three +1/+1 counters on it.
, Remove a +1/+1 counter from Triskelavus: Create a 1/1 colorless Triskelavite artifact creature token with flying. It has "Sacrifice this creature: This creature deals 1 damage to any target."

Constellation — Whenever an enchantment enters the battlefield under your control, Triton Waverider gains flying until end of turn.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II — Put a +1/+1 counter on target creature you control with the greatest power.
III — Target creature you control with the greatest power gains flying, first strike, and lifelink until end of turn.

: Trophy Hunter deals 1 damage to target creature with flying.
Whenever a creature with flying dealt damage by Trophy Hunter this turn dies, put a +1/+1 counter on Trophy Hunter.

Tropical Storm deals X damage to each creature with flying and 1 additional damage to each blue creature.

Flying
At the beginning of your end step, tap all lands you control.

Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever Trusted Pegasus attacks, target attacking creature without flying gains flying until end of turn.

Flying
Whenever Trygon Predator deals combat damage to a player, you may destroy target artifact or enchantment that player controls.

Flying
, : Target creature gets +2/+2 until end of turn.