Haste
Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)
Prevent all noncombat damage that would be dealt to other creatures you control.
: Tajic, Legion's Edge gains first strike until end of turn.

All Sliver creatures have first strike.

First strike
Whenever Talruum Champion blocks or becomes blocked by a creature, that creature loses first strike until end of turn.

Tek gets +0/+2 as long as you control a Plains, has flying as long as you control an Island, gets +2/+0 as long as you control a Swamp, has first strike as long as you control a Mountain, and has trample as long as you control a Forest.

First strike
When Thalia's Lancers enters the battlefield, you may search your library for a legendary card, reveal it, put it into your hand, then shuffle your library.

First strike
Noncreature spells cost more to cast.

First strike
Creatures and nonbasic lands your opponents control enter the battlefield tapped.

[+1]: Draw a card, then discard a card.
[+1]: Target creature gets +2/+0 and gains first strike and trample until end of turn.
[−8]: Draw four cards. When you do, The Royal Scions deals damage to any target equal to the number of cards in your hand.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Thorned Moloch has first strike as long as it's attacking.

, : Target creature gains first strike until end of turn.
, : Tap target creature.

First strike, vigilance
Champion a Kithkin (When this enters the battlefield, sacrifice it unless you exile another Kithkin you control. When this leaves the battlefield, that card returns to the battlefield.)
Thoughtweft Trio can block any number of creatures.

As long as Thran Golem is enchanted, it gets +2/+2 and has flying, first strike, and trample.

You may cast Throat Wolf during an opponent's combat phase.
Firstest strike (This creature deals combat damage to creatures before creatures with first strike.)
After each opponent's first combat phase of each turn, there is an additional combat phase. Only Throat Wolf can attack during that combat phase.

Flying, first strike

Target creature gets +2/+0 and gains first strike until end of turn. (It deals combat damage before creatures without first strike.)

: Add .
: Thunder Totem becomes a 2/2 white Spirit artifact creature with flying and first strike until end of turn.

First strike, trample, haste
Crew 1 (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.)

First strike
Black spells and green spells you cast cost less to cast.

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.

: For each attacking creature without flying, its controller may pay . If that player doesn't, creatures you control blocking that creature gain first strike until end of turn.