Affinity
A Modern deck, by Pieter Tubergen
5th place at a tournament in Charlotte, North Carolina, United States on 2017-10-14

Maindeck:

Artifacts
4 Cranial Plating
4 Springleaf Drum
2 Welding Jar

Artifact Creatures
4 Arcbound Ravager
4 Master of Etherium
2 Memnite
4 Ornithopter
4 Signal Pest
2 Steel Overseer
3 Vault Skirge

Instants
1 Galvanic Blast
1 Stubborn Denial

Legendary Artifacts
4 Mox Opal (Banned in Modern)

Legendary Artifact Creatures
1 Hope of Ghirapur

Sorceries
4 Thoughtcast

Artifact Lands
4 Darksteel Citadel

Basic Lands
1 Island

Lands
3 Blinkmoth Nexus
1 Glimmervoid
4 Inkmoth Nexus
3 Spire of Industry

Sideboard:
3 Etched Champion
1 Blood Moon
2 Ghirapur Aether Grid
1 Eidolon of Rhetoric
1 Ancient Grudge
2 Dispatch
1 Thalia, Guardian of Thraben
1 Stain the Mind
2 Thoughtseize
1 Vandalblast