Keyword: Flash

Flash
Reach
When Cloudthresher enters, it deals 2 damage to each creature with flying and each player.
Evoke (You may cast this spell for its evoke cost. If you do, it’s sacrificed when it enters.)

Flash
When Briarhorn enters, 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.)

Flash
You may have Stunt Double enter as a copy of any creature on the battlefield.

Flash (You may cast this spell any time you could cast an instant.)
Flying

Flash (You may cast this spell any time you could cast an instant.)
When Affa Guard Hound enters, target creature gets +0/+3 until end of turn.

Flash (You may cast this spell any time you could cast an instant.)
When Deceiver Exarch enters, choose one —
• Untap target permanent you control.
• Tap target permanent an opponent controls.

Flash (You may cast this spell any time you could cast an instant.)
Enchant creature
Enchanted creature doesn’t untap during its controller’s untap step.

Flash (You may cast this spell any time you could cast an instant.)
Flying
When Hollowhenge Spirit enters, remove target attacking or blocking creature from combat.

Flash
Lifelink
When Heron’s Grace Champion enters, other Humans you control get +1/+1 and gain lifelink until end of turn.

Flash
Flying
Whenever this creature or another Spirit you control enters, tap target creature an opponent controls.

Flash
Emerge (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature’s mana value.)
When you cast this spell, tap up to four target permanents.

Flash
When Spirit of the Hunt enters, each other creature you control that’s a Wolf or a Werewolf gets +0/+3 until end of turn.

Flash
When this creature enters, other creatures you control get +0/+1 until end of turn.

Flash (You may cast this spell any time you could cast an instant.)
Reach (This creature can block creatures with flying.)

Flash
Enchant creature
Enchanted creature gets -X/-0, where X is the number of cards in your graveyard.

Flash
Flying
When this creature enters, exile target spell with mana value 4 or less.
When this creature leaves the battlefield, the exiled card’s owner may cast that card without paying its mana cost.

Flash (You may cast this spell any time you could cast an instant.)
Emerge (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature’s mana value.)
Drownyard Behemoth has hexproof as long as it entered this turn.

Flash (You may cast this spell any time you could cast an instant.)
Flying
Other creatures you control with flying get +1/+1.

Flash
When Dualcaster Mage enters, copy target instant or sorcery spell. You may choose new targets for the copy.

Flash
When Whitemane Lion enters, return a creature you control to its owner’s hand.

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

Flash
Creatures you control get +2/+2.

Flash
When Caller of the Claw enters, create a 2/2 green Bear creature token for each nontoken creature put into your graveyard from the battlefield this turn.

Flash
When Mystic Snake enters, counter target spell.