Keyword: Flash

Flash
When Ashiok’s Erasure enters the battlefield, exile target spell.
Your opponents can’t cast spells with the same name as the exiled card.
When Ashiok’s Erasure leaves the battlefield, return the exiled card to its owner’s hand.

Flash
Enchant creature you control
When Starlit Mantle enters the battlefield, enchanted creature gains hexproof until end of turn. (It can’t be the target of spells or abilities your opponents control.)
Enchanted creature gets +1/+1.

Flash
When Ashiok’s Erasure enters the battlefield, exile target spell.
Your opponents can’t cast spells with the same name as the exiled card.
When Ashiok’s Erasure leaves the battlefield, return the exiled card to its owner’s hand.

Flash
When Omen of the Sun enters the battlefield, create two 1/1 white Human Soldier creature tokens and you gain 2 life.
, Sacrifice Omen of the Sun: Scry 2.

Flash
Flying
When Threnody Singer enters the battlefield, target creature an opponent controls gets -X/-0 until end of turn, where X is your devotion to blue. (Each in the mana costs of permanents you control counts toward your devotion to blue.)

Flash
Flying
Spells you cast with converted mana cost 5 or greater cost less to cast and can’t be countered.

Flash
Flying

Flash
When Omen of the Sea enters the battlefield, scry 2, then draw a card.
, Sacrifice Omen of the Sea: Scry 2.

Flash
When Ashiok’s Forerunner enters the battlefield, you may search your library and/or graveyard for a card named Ashiok, Sculptor of Fears, reveal it, and put it into your hand. If you search your library this way, shuffle it.

Flash
When Omen of the Hunt enters the battlefield, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle your library.
, Sacrifice Omen of the Hunt: Scry 2.

Flash
When Omen of the Dead enters the battlefield, return target creature card from your graveyard to your hand.
, Sacrifice Omen of the Dead: Scry 2.

Flash
Flying
When Vendilion Clique enters the battlefield, look at target player’s hand. You may choose a nonland card from it. If you do, that player reveals the chosen card, puts it on the bottom of their library, then draws a card.

Flash
Flying
Champion a Faerie (When this enters the battlefield, sacrifice it unless you exile another Faerie you control. When this leaves the battlefield, that card returns to the battlefield.)
When a Faerie is championed with Mistbind Clique, tap all lands target player controls.

Flash
Flying
When Spellstutter Sprite enters the battlefield, counter target spell with converted mana cost X or less, where X is the number of Faeries you control.

Flash (You may cast this spell any time you could cast an instant.)
When Bounding Krasis enters the battlefield, you may tap or untap target creature.

Flash (You may cast this spell any time you could cast an instant.)
Enchant creature
Enchanted creature gets +1/+1.
Totem armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)

Flash (You may cast this spell any time you could cast an instant.)
When Village Bell-Ringer enters the battlefield, untap all creatures you control.

Flash (You may cast this spell any time you could cast an instant.)
Split second (As long as this spell is on the stack, players can’t cast spells or activate abilities that aren’t mana abilities.)
Flying
Other white creatures get +1/+1.

Flash
Flying

Flash
Whenever a creature you control dies, each opponent sacrifices a creature.

Flash
Flying
You may cast historic spells as though they had flash. (Artifacts, legendaries, and Sagas are historic.)

Flash

Flash
Creatures you control get +2/+2.

Flash
When Cast Out enters the battlefield, exile target nonland permanent an opponent controls until Cast Out leaves the battlefield.
Cycling (, Discard this card: Draw a card.)

Flash
When Briarhorn enters the battlefield, target creature gets +3/+3 until end of turn.
Evoke (You may cast this spell for its evoke cost. If you do, it’s sacrificed when it enters the battlefield.)