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Hardened Scales
A Pioneer deck, by Christian Vitanza
3rd place at a tournament in Chantilly, Virginia, United States on 2020-01-12
As reported at http://www.starcitygames.com

Maindeck:

Artifact Creatures
4 Hangarback Walker
3 Stonecoil Serpent
4 Walking Ballista (Banned in Pioneer)

Creatures
3 Elvish Mystic
3 Llanowar Elves
1 Lotleth Troll
4 Voracious Hydra
4 Winding Constrictor

Enchantments
4 Hardened Scales

Legendary Creatures
2 Rishkar, Peema Renegade

Legendary Planeswalkers
3 Nissa, Voice of Zendikar
3 Vivien, Arkbow Ranger

Basic Lands
8 Forest

Lands
4 Blooming Marsh
1 Hashep Oasis
1 Karn's Bastion
4 Llanowar Wastes
4 Overgrown Tomb

Sideboard:
2 Damping Sphere
1 Lifecrafter's Bestiary
2 Scavenging Ooze
1 Shapers' Sanctuary
2 Abrupt Decay
3 Fatal Push
1 Golgari Charm
3 Thoughtseize