Mono-Green Ramp
A Pioneer deck, by Chris Kuhlow
2nd place at a tournament in Columbus, Ohio, United States on 2020-01-05

Maindeck:

Artifact Creatures
1 Walking Ballista (Banned in Pioneer)

Creatures
4 Arboreal Grazer
4 Cavalier of Thorns
4 Elvish Rejuvenator
4 Gilded Goose
2 Oblivion Sower
1 Thought-Knot Seer
1 Ulvenwald Hydra
4 World Breaker

Legendary Creatures
2 Ulamog, the Ceaseless Hunger

Legendary Planeswalkers
2 Ugin, the Spirit Dragon

Sorceries
4 Nissa's Pilgrimage

Basic Lands
9 Forest

Lands
2 Blast Zone
4 Castle Garenbrig
4 Radiant Fountain
4 Sanctum of Ugin
4 Shrine of the Forsaken Gods

Sideboard:
3 Damping Sphere
1 Walking Ballista (Banned in Pioneer)
1 Scavenging Ooze
3 Thought-Knot Seer
2 Tireless Tracker
4 Spatial Contortion
1 Emrakul, the Promised End