Keyword: Boast

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.)

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.)

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.)

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.)

Boast — : Untap Axgard Braggart. Put a +1/+1 counter on it. (Activate this ability only if this creature attacked this turn and only once each turn.)

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.)

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.)

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.)

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.)

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.)

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.)

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

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.)

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.)

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.)

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.)

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.)

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.)

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.)

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.)

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.)

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.)

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.)

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.)

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.)