Vow of Lightning

Enchant creature
Enchanted creature gets +2/+2, has first strike, and can’t attack you or a planeswalker you control.

Noxious Dragon

Flying
When Noxious Dragon dies, you may destroy target creature with converted mana cost 3 or less.

Thundermaw Hellkite

Flying
Haste (This creature can attack and as soon as it comes under your control.)
When Thundermaw Hellkite enters the battlefield, it deals 1 damage to each creature with flying your opponents control. Tap those creatures.

Warren Instigator

Double strike
Whenever Warren Instigator deals damage to an opponent, you may put a Goblin creature card from your hand onto the battlefield.

Master of Waves

Protection from red
Elemental creatures you control get +1/+1.
When Master of Waves enters the battlefield, create a number of 1/0 blue Elemental creature tokens equal to your devotion to blue. (Each in the mana costs of permanents you control counts toward your devotion to blue.)

Harbinger of the Tides

You may cast Harbinger of the Tides as though it had flash if you pay more to cast it. (You may cast it any time you could cast an instant.)
When Harbinger of the Tides enters the battlefield, you may return target tapped creature an opponent controls to its owner’s hand.

Goblin Rabblemaster

Other Goblin creatures you control attack each combat if able.
At the beginning of combat on your turn, create a 1/1 red Goblin creature token with haste.
Whenever Goblin Rabblemaster attacks, it gets +1/+0 until end of turn for each other attacking Goblin.

Hijack

Gain control of target artifact or creature until end of turn. Untap it. It gains haste until end of turn.

Burning Sun’s Avatar

When Burning Sun’s Avatar enters the battlefield, it deals 3 damage to target opponent or planeswalker and 3 damage to up to one target creature.

Firecannon Blast

Firecannon Blast deals 3 damage to target creature.
Raid — Firecannon Blast deals 6 damage instead if you attacked this turn.

Clone Legion

For each creature target player controls, create a token that’s a copy of that creature.

Izzet Chemister

Haste
, : Exile target instant or sorcery card from your graveyard.
, , Sacrifice Izzet Chemister: Cast any number of cards exiled with Izzet Chemister without paying their mana costs.

Balan, Wandering Knight

First strike
Balan, Wandering Knight has double strike as long as two or more Equipment are attached to it.
: Attach all Equipment you control to Balan.

Harbinger of the Tides

You may cast Harbinger of the Tides as though it had flash if you pay more to cast it. (You may cast it any time you could cast an instant.)
When Harbinger of the Tides enters the battlefield, you may return target tapped creature an opponent controls to its owner’s hand.

Resilient Khenra

When Resilient Khenra enters the battlefield, you may have target creature get +X/+X until end of turn, where X is Resilient Khenra’s power.
Eternalize (, Exile this card from your graveyard: Create a token that’s a copy of it, except it’s a 4/4 black Zombie Jackal Wizard with no mana cost. Eternalize only as a sorcery.)

Nicol Bolas, the Deceiver

+3: Each opponent loses 3 life unless that player sacrifices a nonland permanent or discards a card.
−3: Destroy target creature. Draw a card.
−11: Nicol Bolas, the Deceiver deals 7 damage to each opponent. You draw seven cards.

Sinuous Striker

: Sinuous Striker gets +1/-1 until end of turn.
Eternalize—, Discard a card. (, Discard a card, Exile this card from your graveyard: Create a token that’s a copy of it, except it’s a 4/4 black Zombie Naga Warrior with no mana cost. Eternalize only as a sorcery.)