Flying, vigilance, lifelink
Fabricate 2 (When this creature enters the battlefield, put two +1/+1 counters on it or create two 1/1 colorless Servo artifact creature tokens.)
Other creatures you control get +1/+1.

Whenever one or more +1/+1 counters are put on a permanent you control, you may pay . If you do, create a 1/1 colorless Servo artifact creature token.
, : Choose a counter on target permanent or player. Give that permanent or player another counter of that kind.

Destroy target artifact or enchantment. You gain 2 life.

Trample
When Arborback Stomper enters the battlefield, you gain 5 life.

When Armorcraft Judge enters the battlefield, draw a card for each creature you control with a +1/+1 counter on it.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle your library. You get (two energy counters).

Audacious Infiltrator can't be blocked by artifact creatures.

Creatures your opponents control enter the battlefield tapped.
Whenever a creature enters the battlefield under an opponent's control, you gain 1 life.

When Aviary Mechanic enters the battlefield, you may return another permanent you control to its owner's hand.

Whenever Ballista Charger attacks, it deals 1 damage to any target.
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.)

Return up to three target artifacts and/or creatures to their owners' hands.
You may cast a spell with converted mana cost 4 or less from your hand without paying its mana cost.

Instant and sorcery spells you cast cost less to cast.
Whenever a spell or ability you control counters a spell, you may draw a card. If you do, discard a card.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for .)
Barricade Breaker attacks each combat if able.

: Bastion Mastodon gains vigilance until end of turn.

Blooming Marsh enters the battlefield tapped unless you control two or fewer other lands.
: Add or .

Target creature you control gets +2/+2 and gains hexproof until end of turn.

When Bomat Bazaar Barge enters the battlefield, draw a card.
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.)

Haste
Whenever Bomat Courier attacks, exile the top card of your library face down. (You can't look at it.)
, Discard your hand, Sacrifice Bomat Courier: Put all cards exiled with Bomat Courier into their owners' hands.

Botanical Sanctum enters the battlefield tapped unless you control two or fewer other lands.
: Add or .

When Bristling Hydra enters the battlefield, you get (three energy counters).
Pay : Put a +1/+1 counter on Bristling Hydra. It gains hexproof until end of turn.