
Firehoof Cavalry | Creature | Human Berserker | {3}{R}: Firehoof Cavalry gets +2/+0 and gains trample until end of turn. | YW Tang

Leaping Master | Creature | Human Monk | {2}{W}: Leaping Master gains flying until end of turn. | Anastasia Ovchinnikova

Mardu Warshrieker | Creature | Orc Shaman | Raid — When Mardu Warshrieker enters the battlefield, if you attacked this turn, add {R}{W}{B}. | Yefim Kligerman

Efreet Weaponmaster | Creature | Efreet Monk | 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 {2}{U}{R}{W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) | Ryan Alexander Lee

Ponyback Brigade | Creature | Goblin Warrior | When Ponyback Brigade enters the battlefield or is turned face up, create three 1/1 red Goblin creature tokens.
Morph {2}{R}{W}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) | Mark Zug

Jeskai Banner | Artifact | | {T}: Add {U}, {R}, or {W}.
{U}{R}{W}, {T}, Sacrifice Jeskai Banner: Draw a card. | Daniel Ljunggren

Mardu Banner | Artifact | | {T}: Add {R}, {W}, or {B}.
{R}{W}{B}, {T}, Sacrifice Mardu Banner: Draw a card. | Daniel Ljunggren

Wind-Scarred Crag | Land | | Wind-Scarred Crag enters the battlefield tapped.
When Wind-Scarred Crag enters the battlefield, you gain 1 life.
{T}: Add {R} or {W}. | Eytan Zana