First strike
Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)
Whenever Consul's Lieutenant attacks, if it's renowned, other attacking creatures you control get +1/+1 until end of turn.

Up to two target creatures each get +1/+0 and gain first strike until end of turn.

First strike
At the beginning of your upkeep, destroy Cosmic Horror unless you pay . If Cosmic Horror is destroyed this way, it deals 7 damage to you.

Flying
Whenever Crimson Roc blocks a creature without flying, Crimson Roc gets +1/+0 and gains first strike until end of turn.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
Target creature gets +1/+0 and gains first strike until end of turn. (It deals combat damage before creatures without first strike.)

Enchant creature
Enchanted creature gets +1/+0 and has first strike.
Sacrifice Crown of Fury: Enchanted creature and other creatures that share a creature type with it get +1/+0 and gain first strike until end of turn.

At the beginning of combat on your turn, choose a kind of counter at random that Crystalline Giant doesn't have on it from among flying, first strike, deathtouch, hexproof, lifelink, menace, reach, trample, vigilance, and +1/+1. Put a counter of that kind on Crystalline Giant.

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

Target creature gets +1/+1 and gains flying and first strike until end of turn.

First strike
When Daru Cavalier enters the battlefield, you may search your library for a card named Daru Cavalier, reveal it, and put it into your hand. If you do, shuffle your library.

First strike
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Enchant creature with another Aura attached to it
Enchanted creature gets +3/+3 and has first strike, vigilance, and lifelink. (Damage dealt by the creature also causes its controller to gain that much life.)

Imprint — : Exile target creature card from your graveyard.
As long as a card exiled with Death-Mask Duplicant has flying, Death-Mask Duplicant has flying. The same is true for fear, first strike, double strike, haste, landwalk, protection, and trample.

First strike
Shroud (This creature can't be the target of spells or abilities.)

Kicker and/or (You may pay an additional and/or as you cast this spell.)
If Degavolver was kicked with its kicker, it enters the battlefield with two +1/+1 counters on it and with "Pay 3 life: Regenerate Degavolver."
If Degavolver was kicked with its kicker, it enters the battlefield with a +1/+1 counter on it and with first strike.

Whenever a Minotaur attacks this turn, it gains first strike until end of turn and must be blocked this turn if able.

Strive — This spell costs more to cast for each target beyond the first.
Any number of target creatures each get +2/+0 and gain first strike and vigilance until end of turn.

First strike
When Dire Fleet Daredevil enters the battlefield, exile target instant or sorcery card from an opponent's graveyard. You may cast it this turn, and you may spend mana as though it were mana of any type to cast that spell. If that spell would be put into a graveyard this turn, exile it instead.

: Disciple of the Old Ways gains first strike until end of turn.

Ferocious — If you control a creature with power 4 or greater, you may cast Dragon Grip as though it had flash. (You may cast it any time you could cast an instant.)
Enchant creature
Enchanted creature gets +2/+0 and has first strike.