Automated Artificer

{T}: Add {C}. Spend this mana only to activate an ability or cast an artifact spell.

Shimmer Myr

Flash
You may cast artifact spells as though they had flash.

Mechtitan Core

{5}, Exile this Vehicle and four other artifact creatures and/or Vehicles you control: Create Mechtitan, a legendary 10/10 Construct artifact creature token with flying, vigilance, trample, lifelink, and haste that's all colors. When that token leaves the battlefield, return all cards exiled with this Vehicle except this card to the battlefield tapped under their owners' control.
Crew 2

Behold the Multiverse

Scry 2, then draw two cards.
Foretell {1}{U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Myr Incubator

{6}, {T}, Sacrifice this artifact: Search your library for any number of artifact cards, exile them, then create that many 1/1 colorless Myr artifact creature tokens. Then shuffle.

Silver Myr

Counterspell

Keep Safe

Counter target spell that targets a permanent you control.
Draw a card.

Hedron Crawler

{T}: Add {C}. ({C} represents colorless mana.)