Defender, first strike

First strike
: Until end of turn, Dragonsoul Knight becomes a Dragon, gets +5/+3, and gains flying and trample.

Flying, first strike
Whenever Drana, Liberator of Malakir deals combat damage to a player, put a +1/+1 counter on each attacking creature you control.

First strike
Whenever Dromoka Captain attacks, bolster 1. (Choose a creature with the least toughness among creatures you control and put a +1/+1 counter on it.)

Enchant creature
Enchanted creature gets +2/+2, has first strike, and is a Knight in addition to its other types. (It deals combat damage before creatures without first strike.)

Discard a card at random: Dwarven Strike Force gains first strike and haste until end of turn.

First strike, trample
At the beginning of your upkeep, put a -2/-2 counter on Ebon Praetor.
Sacrifice a creature: Remove a -2/-2 counter from Ebon Praetor. If the sacrificed creature was a Thrull, put a +1/+0 counter on Ebon Praetor. Activate this ability only during your upkeep and only once each turn.

Eminence — Whenever you cast another Vampire spell, if Edgar Markov is in the command zone or on the battlefield, create a 1/1 black Vampire creature token.
First strike, haste
Whenever Edgar Markov attacks, put a +1/+1 counter on each Vampire you control.

First strike
When Efreet Weaponmaster enters the battlefield or is turned face up, another target creature you control gets +3/+0 until end of turn.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

First strike
Loyalty abilities of planeswalkers your opponents control cost more to activate.

Flying, first strike

First strike, vigilance
Protection from Vampires, from Werewolves, and from Zombies

First strike

Reach (This creature can block creatures with flying.)
As long as you control a red permanent, Ember Weaver gets +1/+0 and has first strike.

Whenever you cast a black spell, Emberstrike Duo gets +1/+1 until end of turn.
Whenever you cast a red spell, Emberstrike Duo gains first strike until end of turn.

Flying
: Emerald Dragonfly gains first strike until end of turn.

First strike
When Emissary of Sunrise enters the battlefield, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

First strike
, , Sacrifice Encampment Keeper: Creatures you control get +2/+2 until end of turn.

First strike
When Enlistment Officer enters the battlefield, reveal the top four cards of your library. Put all Soldier cards revealed this way into your hand and the rest on the bottom of your library in any order.

, Sacrifice Enslaved Dwarf: Target black creature gets +1/+0 and gains first strike until end of turn.