At the beginning of the end step, if you control no artifacts, sacrifice Glimmervoid.
: Add one mana of any color to your mana pool.

Metalcraft - : Add one mana of any color to your mana pool. Activate this ability only if you control three or more artifacts.

Affinity for artifacts
Draw two cards.

Whenever you cast a creature spell this turn, draw a card.

Battle cry
Signal Pest can't be blocked except by creatures with flying or reach.

( can be paid with either or 2 life.)
Flying
Lifelink

Flying

Flying
When Glint Hawk enters the battlefield, sacrifice it unless you return an artifact you control to its owner's hand.

: Add to your mana pool.
: Inkmoth Nexus becomes a 1/1 Blinkmoth artifact creature with flying and infect until end of turn. It's still a land.

Affinity for artifacts

When Stoneforge Mystic enters the battlefield, you may search your library for an Equipment card, reveal it, put it into your hand, then shuffle your library.
, : You may put an Equipment card from your hand onto the battlefield.

, Tap an untapped creature you control: Add one mana of any color to your mana pool.

Equipped creature gets +1/+0 for each artifact you control.
: Attach Cranial Plating to target creature you control.
Equip

(Tree of Tales isn't a spell.)
: Add to your mana pool.

(Ancient Den isn't a spell.)
: Add to your mana pool.

Sacrifice an artifact: Put a +1/+1 counter on Arcbound Ravager.
Modular 1

(Seat of the Synod isn't a spell.)
: Add to your mana pool.

Tap target creature.
Metalcraft - If you control three or more artifacts, exile that creature.

Destroy target artifact.
Flashback

Each player who has cast a nonartifact spell this turn can't cast additional nonartifact spells.

: Target player exiles a card from his or her graveyard.
, Exile Relic of Progenitus: Exile all cards from all graveyards. Draw a card.

, Sacrifice Tormod's Crypt: Exile all cards from target player's graveyard.