Make a common artifact creature with a backstory. Interpret liberally.
Let's start the voting!
Ice Golem Artifact Creature - GolemWhenever ~ is dealt damage, sacrifice it.
4/4
Long ago, it was a water elemental. When the plane stopped moving, its fluid form was turned to brittle ice. Solar Golem
artifact Creature-golem (C)
Vigilance
Its creator expected it to be inactive each night. He was wrong. 3/3
Frostcore Sentinel Artifact Creature - Construct (C)
Defender
Whenever Frostcore Sentinel is dealt damage by a red source, it loses defender until your next end step.
When the heavens stood still, the people below moved to action. When the conflict subsided, the weapons stood ready.2/3
Antique Guardian
Artifact Creature - Construct
When Antique Guardian dies, put a relic artifact token onto the battlefield.
2/1
Soldered Guardian
Artifact Creature -- Construct (C) [0/3]Defender
Sacrifice Soldered Guardian: The next artifact spell you cast
this turn costs
less to cast.
Its joints were melted together by the unfeeling sun of Illpyre, forcing it to stare out at the ruins of the city and corpses of the people it could not save.Scavenged Remnant Dragon
Artifact Creature - Dragon
~ gains flying until the end of turn
Born from both characteristics of what remains; that which betrays that there was once life before the lifelessness, and that which betrays that there is life within lifelessness. Its creators are now just a whisper in the wind, scattered across the wastes and ruins that are of its kind - rusted, decrepit, and falling to pieces.5/5
Inert Sentinel Artifact Creature
Inert Sentinel gets +3/+0 as long as you control an enchantment.
0/3
The artificers had no difficulty producing working vessels, but a great deal of it trying to animate them. Half a world a way another group was experiencing the exact opposite problem Sunguard Automaton
Artifact Creature - Golem (C)
Whenever an Enchantment enters the battlefield under a player's control, that player gains control of Sunguard Automaton.
WHAT.HAVE.YOU.DONE.FOR.ME.LATELY? 3/3
I vote for Cato.