
Emissary Escort | Artifact Creature | Robot Soldier | This creature gets +X/+0, where X is the greatest mana value among other artifacts you control. | Igor Grechanyi

Mechan Assembler | Artifact Creature | Robot Artificer | Whenever another artifact you control enters, create a 2/2 colorless Robot artifact creature token. This ability triggers only once each turn. | Mirko Failoni

Mechan Navigator | Artifact Creature | Robot Pilot | Whenever this creature becomes tapped, draw a card, then discard a card. | Konstantin Porubov

Mechan Shieldmate | Artifact Creature | Robot Soldier | Defender
As long as an artifact entered the battlefield under your control this turn, this creature can attack as though it didn't have defender. | Daniel Ljunggren

Mechanozoa | Artifact Creature | Robot Jellyfish | When this creature enters, tap target artifact or creature an opponent controls and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
Warp {2}{U} (You may cast this card from your hand for its warp cost. Exile this creature at the beginning of the next end step, then you may cast it from exile on a later turn.) | Daarken

Nanoform Sentinel | Artifact Creature | Robot | Whenever this creature becomes tapped, untap another target permanent. This ability triggers only once each turn. | Tianxing Xu

Selfcraft Mechan | Artifact Creature | Robot Artificer | When this creature enters, you may sacrifice an artifact. When you do, put a +1/+1 counter on target creature and draw a card. | Milivoj Ćeran

Steelswarm Operator | Artifact Creature | Robot Soldier | Flying
{T}: Add {U}. Spend this mana only to cast an artifact spell.
{T}: Add {U}{U}. Spend this mana only to activate abilities of artifact sources. | Cristi Balanescu

Pinnacle Emissary | Artifact Creature | Robot | Whenever you cast an artifact spell, create a 1/1 colorless Drone artifact creature token with flying and "This token can block only creatures with flying."
Warp {U/R} (You may cast this card from your hand for its warp cost. Exile this creature at the beginning of the next end step, then you may cast it from exile on a later turn.) | Alejandro Pacheco