
Unswerving Sloth | Creature | Sloth Mount | Whenever this creature attacks while saddled, it gains indestructible until end of turn. Untap all creatures you control.
Saddle 4 (Tap any number of other creatures you control with total power 4 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.) | Daren Bader

Memory Guardian | Artifact Creature | Robot Artificer | Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Flying | Hardy Fowler

Spikeshell Harrier | Artifact Creature | Robot Turtle | When this creature enters, return target creature or Vehicle an opponent controls to its owner's hand. If that opponent's speed is greater than each other player's speed, reduce that opponent's speed by 1. This effect can't reduce their speed below 1. | Alfonso Santano

Trade the Helm | Sorcery | | Exchange control of target artifact or creature you control and target artifact or creature an opponent controls.
Cycling {2} ({2}, Discard this card: Draw a card.) | Lius Lasahido

Back on Track | Sorcery | | Return target creature or Vehicle card from your graveyard to the battlefield. Create a 1/1 colorless Pilot creature token with "This token saddles Mounts and crews Vehicles as though its power were 2 greater." | Raoul Vitale

Risen Necroregent | Creature | Zombie Cat Knight | Start your engines! (If you have no speed, it starts at 1. It increases once on each of your turns when an opponent loses life. Max speed is 4.)
Max speed — At the beginning of your end step, create a 2/2 black Zombie creature token. | Inkognit

Spire Mechcycle | Artifact | Vehicle | Haste
Exhaust — Tap another untapped Mount or Vehicle you control: This Vehicle becomes an artifact creature. Put a +1/+1 counter on it for each Mount and/or Vehicle you control other than this Vehicle. (Activate each exhaust ability only once.)
Crew 2 | Adam Volker

Earthrumbler | Artifact | Vehicle | Vigilance, trample
Exile an artifact or creature card from your graveyard: This Vehicle becomes an artifact creature until end of turn.
Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.) | J.P. Targete

Terrian, World Tyrant | Legendary Creature | Dinosaur Ooze | | Nicholas Gregory

Haunt the Network | Sorcery | | Choose target opponent. Create two 1/1 colorless Thopter artifact creature tokens with flying. Then the chosen player loses X life and you gain X life, where X is the number of artifacts you control. | Jeff Carpenter