Mogg Fanatic

Sacrifice Mogg Fanatic: It deals 1 damage to any target.

Tyrant of Valakut

Surge {3}{R}{R} (You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.)
Flying
When Tyrant of Valakut enters, if its surge cost was paid, it deals 3 damage to any target.

Thundering Raiju

Haste
Whenever Thundering Raiju attacks, put a +1/+1 counter on target creature you control. Then Thundering Raiju deals X damage to each opponent, where X is the number of modified creatures you control other than Thundering Raiju. (Equipment, Auras you control, and counters are modifications.)

Torch Fiend

{R}, Sacrifice Torch Fiend: Destroy target artifact.

Ronin Houndmaster

Haste
Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.)

Bladetusk Boar

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Fiery Hellhound

{R}: Fiery Hellhound gets +1/+0 until end of turn.

Two-Headed Cerberus

Double strike (This creature deals both first-strike and regular combat damage.)

Ruinous Gremlin

{2}{R}, Sacrifice Ruinous Gremlin: Destroy target artifact.

Havoc Devils

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Zagras, Thief of Heartbeats

This spell costs {1} less to cast for each creature in your party.
Flying, deathtouch, haste
Other creatures you control have deathtouch.
Whenever a creature you control deals combat damage to a planeswalker, destroy that planeswalker.