Big Bertha (Blue)

Boost
When this is banished from boosting, put a steam counter on a Hyper Driver you control.

Crankshaft (Blue)

When Crankshaft is banished to pay a boost cost, put a steam counter on a Hyper Driver you control.
Boost (As an additional cost to play this, you may banish the top card of your deck. If it's Mechanologist, this gains go again.)

Meganetic Shockwave

The defending hero must defend Meganetic Shockwave with X equipment they control, where X is the number of times you have boosted this combat chain.

Re-Charge! (Blue)

Put a steam counter on a Hyper Driver you control.
The next attack you boost this turn gets +2{p}.
Go again

Supercell

Put X steam counters on X target Hyper Drivers you control.
Create a Hyper Driver token with X steam counters.
If X is 3 or greater, you may shuffle a Construct Nitro Mechanoid from your banished zone into your deck.

T-Bone (Blue)

If you control a card on the combat chain that was boosted, the defending hero must defend T-Bone with an equipment they control if able.

Boost (As an additional cost to play T-Bone, you may banish the top card of your deck. If it's a Mechanologist card, T-Bone gains go again.)

Teklo Pounder

Teklo Pounder enters the arena with 3 steam counters on it. When Teklo Pounder has no steam counters on it, destroy it. 

Once per Turn Effect- Whenever you boost an attack action card, remove a steam counter from Teklo Pounder. If you do, the attack gains +2[Power].

Throttle (Blue)

Boost (As an additional cost to play Throttle, you may banish the top card of your deck. If it's a Mechanologist card, Throttle gains go again.)

Achilles Accelerator

Instant - Destroy Achilles Accelerator: Gain 1 action point. Activate this ability only if you have boosted this turn.

Arcane Barrier 1 (If your hero would be dealt arcane damage, you may pay [1 Resource] instead. If you do, prevent 1 arcane damage that source would deal.)

Cogwerx Base Legs

When this is equipped, put a steam counter on it.
Once per turn Instant -- {r}, remove a steam counter from this: Gain 1 action point. Activate this ability only if you've boosted this turn.

Galvanic Bender

Material - While this is under a permanent, that permanent has +1{p}.
Battleworn (When the combat chain closes, if this defended, put a -1{d} counter on it.)

Spell Fray Gloves

Spellvoid 1 (If your hero would be dealt arcane damage, you may destroy Spell Fray Gloves to prevent 1 of that damage.)

Teklo Foundry Heart

Once per Turn Action - [1 Resource]: Banish the top 2 cards of your deck. Gain [1 Resource] for each Mechanologist card banished this way. Activate this ability only if you have boosted this turn. Go again

Battleworn (If you defend with Teklo Foundry Heart, put a -1 [Defense] counter on it when the combat chain closes.)

Teklo Plasma Pistol

Action - Remove a steam counter from Teklo Plasma Pistol: Attack

Action - [1 Resource]: If there are no steam counters on Telko Plasma Pistol, put a steam counter on it. Go again

Viziertronic Model i

Action - Destroy Vizertronic Model i: Whenever you boost this turn, draw a card then put a card from your hand on top of your deck. Go again

Arcane Barrier 2 (If your hero would be dealt arcane damage, you may pay [2 Resource] instead. If you do, prevent 2 arcane damage that source would deal.)

Crankshaft (Red)

Data Link (Red)

Boost
When this hits, opt 1. (Look at the top card of your deck. You may put it on the bottom.)

High Octane

Whenever you boost a card this turn, gain 1 action point.

Draw a card.

Go again

Jump Start (Red)

If you control a Hyper Driver, Jump Start costs {r} less to play.
Boost (As an additional cost to play this, you may banish the top card of your deck. If it's Mechanologist, this gains go again.)

Maximum Velocity

Play Maximum Velocity only if you have boosted 3 or more times this turn.

Pulsewave Harpoon

When this attacks a hero, they reveal X cards from their hand, where X is the number of times you've boosted this combat chain. Choose an action card with {d} less than or equal to X then add it to this chain link as a defending card.
Boost

Re-Charge! (Red)

Put a steam counter on a Hyper Driver you control.
The next attack you boost this turn gets +4{p}.
Go again

Rev Up (Red)

If you control a Hyper Driver, this costs {r} less to play.
Boost (As an additional cost to play this, you may banish the top card of your deck. If it's a Mechanologist card, this gains go again.)

T-Bone (Red)

Throttle (Red)

Twin Drive

Boost (As an additional cost to play this, you may banish the top card of your deck. If it's a Mechanologist card, this gets go again.)
Boost (As an additional cost to play this, you may banish the top card of your deck. If it's a Mechanologist card, this gets go again.)

Zero to Sixty (Red)

Boost (As an additional cost to play Zero to Sixty, you may banish the top card of your deck. If it's a Mechanologist card, Zero to Sixty gains go again.)

Zipper Hit (Red)

Boost (As an additional cost to play Zipper Hit, you may banish the top card of your deck. If it's a Mechanologist card, Zipper Hit gains go again.)

Big Bertha (Yellow)

Construct Nitro Mechanoid

(Constructs resolve flipped as an item in the arena.)
Transform target Mechanologist head, chest, arms, legs, weapon and 3 Hyper Drivers you control into Nitro Mechanoid. If you don't, negate this. (Put them under Nitro Mechanoid. If you don't, put this in the graveyard.)
Go again // Action -- Banish a card from under Nitro Mechanoid: Attack
Overpower (This can't be defended by more than 1 action card.)
Temper (When the combat chain closes, if this defended, put a -1{d} counter on it, then if it has 0{d}, destroy it.)

Crankshaft (Yellow)

Re-Charge! (Yellow)

Put a steam counter on a Hyper Driver you control.
The next attack you boost this turn gets +3{p}.
Go again

Zero to Sixty (Yellow)

Maxx 'The Hype' Nitro

Once per Turn Action -- {r}{r}: Create a Hyper Driver token with 2 steam counters. Activate this ability only if you've boosted this turn.
Hyper Drivers you control get crank. (As it enters the arena, you may remove a steam counter from it. If you do, gain an action point.)