Duskwielder

Boast — : Target opponent loses 1 life and you gain 1 life. (Activate this ability only if this creature attacked this turn and only once each turn.)

Arni Brokenbrow

Haste
Boast — : You may change Arni Brokenbrow’s base power to 1 plus the greatest power among other creatures you control until end of turn. (Activate this ability only if this creature attacked this turn and only once each turn.)

Fearless Pup

First strike
Boast — : Fearless Pup gets +2/+0 until end of turn. (Activate this ability only if this creature attacked this turn and only once each turn.)

Horizon Seeker

Boast — : Search your library for a basic land card, reveal it, put it into your hand, then shuffle your library. (Activate this ability only if this creature attacked this turn and only once each turn.)

Varragoth, Bloodsky Sire

Deathtouch
Boast — : Target player searches their library for a card, then shuffles their library and puts that card on top of it. (Activate this ability only if this creature attacked this turn and only once each turn.)

Goldmaw Champion

Boast — : Tap target creature. (Activate this ability only if this creature attacked this turn and only once each turn.)

Dragonkin Berserker

First strike
Boast abilities you activate cost less to activate for each Dragon you control.
Boast — : Create a 5/5 red Dragon creature token with flying. (Activate this ability only if this creature attacked this turn and only once each turn.)

Eradicator Valkyrie

Flying, lifelink, hexproof from planeswalkers
Boast — , Sacrifice a creature: Each opponent sacrifices a creature or planeswalker. (Activate this ability only if this creature attacked this turn and only once each turn.)

Draugr Recruiter

Boast — : Return target creature card from your graveyard to your hand. (Activate this ability only if this creature attacked this turn and only once each turn.)

Tuskeri Firewalker

Boast — : Exile the top card of your library. You may play that card this turn. (Activate this ability only if this creature attacked this turn and only once each turn.)

Fearless Liberator

Boast — : Create a 2/1 red Dwarf Berserker creature token. (Activate this ability only if this creature attacked this turn and only once each turn.)

Varragoth, Bloodsky Sire

Deathtouch
Boast — : Target player searches their library for a card, then shuffles their library and puts that card on top of it. (Activate this ability only if this creature attacked this turn and only once each turn.)

Eradicator Valkyrie

Flying, lifelink, hexproof from planeswalkers
Boast — , Sacrifice a creature: Each opponent sacrifices a creature or planeswalker. (Activate this ability only if this creature attacked this turn and only once each turn.)

Eradicator Valkyrie

Flying, lifelink, hexproof from planeswalkers
Boast — , Sacrifice a creature: Each opponent sacrifices a creature or planeswalker. (Activate this ability only if this creature attacked this turn and only once each turn.)

Dragonkin Berserker

First strike
Boast abilities you activate cost less to activate for each Dragon you control.
Boast — : Create a 5/5 red Dragon creature token with flying. (Activate this ability only if this creature attacked this turn and only once each turn.)

Varragoth, Bloodsky Sire

Deathtouch
Boast — : Target player searches their library for a card, then shuffles their library and puts that card on top of it. (Activate this ability only if this creature attacked this turn and only once each turn.)

Varragoth, Bloodsky Sire

Deathtouch
Boast — : Target player searches their library for a card, then shuffles their library and puts that card on top of it. (Activate this ability only if this creature attacked this turn and only once each turn.)

Eradicator Valkyrie

Flying, lifelink, hexproof from planeswalkers
Boast — , Sacrifice a creature: Each opponent sacrifices a creature or planeswalker. (Activate this ability only if this creature attacked this turn and only once each turn.)

Usher of the Fallen

Boast — : Create a 1/1 white Human Warrior creature token. (Activate this ability only if this creature attacked this turn and only once each turn.)

Hagi Mob

Boast — : Hagi Mob deals 1 damage to any target. (Activate this ability only if this creature attacked this turn and only once each turn.)

Battershield Warrior

Boast — : Creatures you control get +1/+1 until end of turn. (Activate this ability only if this creature attacked this turn and only once each turn.)

Usher of the Fallen

Boast — : Create a 1/1 white Human Warrior creature token. (Activate this ability only if this creature attacked this turn and only once each turn.)

Arni Brokenbrow

Haste
Boast — : You may change Arni Brokenbrow’s base power to 1 plus the greatest power among other creatures you control until end of turn. (Activate this ability only if this creature attacked this turn and only once each turn.)

Arni Brokenbrow

Haste
Boast — : You may change Arni Brokenbrow’s base power to 1 plus the greatest power among other creatures you control until end of turn. (Activate this ability only if this creature attacked this turn and only once each turn.)

Arni Brokenbrow

Haste
Boast — : You may change Arni Brokenbrow’s base power to 1 plus the greatest power among other creatures you control until end of turn. (Activate this ability only if this creature attacked this turn and only once each turn.)