Hero card

Mendicant Core, Guidelight

Legendary Artifact Creature – Robot

PayoffThe more of what it needs is on the battlefield, the stronger it gets: the deck has to feed it a lot

Needs: Artifacts, Start your engines / Exhaust

Gives: Artifacts, Start your engines / Exhaust, Legendary

Not in winning lists yet: read from the card text and the graph

Build a deck with Mendicant Core, Guidelight as the hero

Makes it work

Nesting Bot · Walking Sarcophagus · Perilous Snare · Simulacrum Synthesizer · Emissary Escort · Guidelight Synergist · Vnwxt, Verbose Host · Pride of the Road

Use instead if you don't have it

Sundial, Dawn Tyrant · Karn, Argent Defender · Emissary Escort · Scorpion Sentinel · Interface Ace · Mouser Mark III

Cards in the meta that answer it

Requiting Hex (Dimir Aggro) · Countersculpt (Azorius Control) · Get Lost (Azorius Control) · Jeskai Revelation (4-Color Control)