Mono-Green Ramp
A Pioneer deck, by Greg Ladestro
4th place at a tournament in Newington, Connecticut, United States on 2020-01-12
As reported at http://www.starcitygames.com

Maindeck:

Artifact Creatures
1 Walking Ballista (Banned in Pioneer)

Creatures
4 Arboreal Grazer
3 Cavalier of Thorns
2 Elvish Mystic
4 Elvish Rejuvenator
2 Llanowar Elves
3 Oblivion Sower
1 Thought-Knot Seer
3 World Breaker

Legendary Artifact Creatures
1 Golos, Tireless Pilgrim

Legendary Creatures
2 Ulamog, the Ceaseless Hunger

Legendary Planeswalkers
3 Ugin, the Spirit Dragon

Sorceries
4 Nissa's Pilgrimage

Basic Lands
12 Forest

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

Sideboard:
3 Damping Sphere
2 Scavenging Ooze
3 Thought-Knot Seer
1 Tireless Tracker
2 Courser of Kruphix
4 Spatial Contortion