Keyword: First strike

First strike
When Nightshade Assassin enters the battlefield, you may reveal X black cards in your hand. If you do, target creature gets -X/-X until end of turn.
Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

First strike
Whenever Alesha, Who Smiles at Death attacks, you may pay . If you do, return target creature card with power 2 or less from your graveyard to the battlefield tapped and attacking.

Flying, first strike, haste
Whenever Mirri the Cursed deals combat damage to a creature, put a +1/+1 counter on Mirri the Cursed.

First strike
Sacrifice Vampire Hexmage: Remove all counters from target permanent.

First strike
Suspend 4— (Rather than cast this card from your hand, you may pay and exile it with four time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost. It has haste.)

Flying, first strike
If a source would deal damage to an opponent or a permanent an opponent controls, that source deals double that damage to that player or permanent instead.
If a source would deal damage to you or a permanent you control, prevent half that damage, rounded up.

Flash
First strike, protection from God creatures
When Sigrid, God-Favored enters the battlefield, exile up to one target attacking or blocking creature until Sigrid leaves the battlefield.

First strike
When Combustible Gearhulk enters the battlefield, target opponent may have you draw three cards. If the player doesn’t, you mill three cards, then Combustible Gearhulk deals damage to that player equal to the total converted mana cost of those cards.

Flash
First strike, protection from God creatures
When Sigrid, God-Favored enters the battlefield, exile up to one target attacking or blocking creature until Sigrid leaves the battlefield.

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.)

Flash
First strike, protection from God creatures
When Sigrid, God-Favored enters the battlefield, exile up to one target attacking or blocking creature until Sigrid leaves the battlefield.

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.)

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.)

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.)

Flying, first strike

Flash
First strike, protection from God creatures
When Sigrid, God-Favored enters the battlefield, exile up to one target attacking or blocking creature until Sigrid leaves the battlefield.

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.)

First strike
If a source would deal damage to an opponent, it deals double that damage to that player instead.

First strike, vigilance
Akiri, Line-Slinger gets +1/+0 for each artifact you control.
Partner (You can have two commanders if both have partner.)

First strike, menace, trample
Partner (You can have two commanders if both have partner.)

First strike, vigilance, lifelink
Aura and Equipment spells you cast cost less to cast.

First strike
: Add an amount of equal to the greatest power among creatures you control that entered the battlefield this turn.
Partner (You can have two commanders if both have partner.)

First strike
: Add an amount of equal to the greatest power among creatures you control that entered the battlefield this turn.
Partner (You can have two commanders if both have partner.)

Flying, first strike, vigilance, trample
At the beginning of each combat, until end of turn, each other creature you control gets +1/+1 if it has flying, +1/+1 if it has first strike, and so on for double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, protection, reach, trample, vigilance, and partner.
Partner

Flying, first strike
Whenever an Aura or Equipment you control is put into a graveyard from the battlefield, you may return that card to its owner’s hand at the beginning of the next end step.