Affinity
A Modern deck, by Richard Grimes
13th place at a tournament in Atlanta, Georgia, United States on 2017-07-22

Maindeck:

Artifacts
4 Cranial Plating
3 Springleaf Drum
1 Welding Jar

Artifact Creatures
4 Arcbound Ravager
3 Etched Champion
2 Master of Etherium
3 Memnite
3 Ornithopter
4 Signal Pest
1 Spellskite
4 Vault Skirge

Instants
3 Galvanic Blast
1 Spell Pierce

Legendary Artifacts
4 Mox Opal (Banned in Modern)

Sorceries
4 Thoughtcast

Artifact Lands
3 Darksteel Citadel

Basic Lands
1 Island

Lands
4 Blinkmoth Nexus
4 Glimmervoid
4 Inkmoth Nexus

Sideboard:
1 Grafdigger's Cage
1 Pithing Needle
1 Relic of Progenitus
1 Spellskite
2 Blood Moon
1 Ghirapur Aether Grid
2 Ancient Grudge
2 Dispatch
1 Surgical Extraction
2 Wear
1 Thoughtseize