Reckless Racer

First strike
Whenever this creature becomes tapped, you may discard a card. If you do, draw a card.

Release the Gremlins

Gremlin

Destroy X target artifacts. Create X 2/2 red Gremlin creature tokens.

Scrapper Champion

Energy Reserve

Double strike (This creature deals both first-strike and regular combat damage.)
When this creature enters, you get {E}{E} (two energy counters).
Whenever this creature attacks, you may pay {E}{E}. If you do, put a +1/+1 counter on it.

Shock

Siege Modification

Enchant creature or Vehicle
As long as enchanted permanent is a Vehicle, it's a creature in addition to its other types.
Enchanted creature gets +3/+0 and has first strike.

Aether Revolt