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Affinity
A Modern deck, by Pieter Tubergen
1st place at a tournament in Cincinnati, Ohio, United States on 2017-10-22

Maindeck:

Artifacts
4 Cranial Plating
4 Springleaf Drum
2 Welding Jar

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

Instants
1 Galvanic Blast
1 Temur Battle Rage

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:
2 Etched Champion
1 Blood Moon
1 Ghirapur Aether Grid
1 Eidolon of Rhetoric
1 Ancient Grudge
2 Dispatch
1 Silence
1 Stubborn Denial
1 Thalia, Guardian of Thraben
2 Thoughtseize
1 Vandalblast
1 Gemstone Caverns