Sultai Delirium
A Pioneer deck, by MatiCheto
4th place at a tournament in Magic Online on 2020-06-03

Maindeck:
2 Forest
2 Island

Artifacts
1 Soul-Guide Lantern

Creatures
2 Murderous Rider
4 Satyr Wayfinder
1 Scavenging Ooze
1 Tireless Tracker

Instants
2 Abrupt Decay
1 Assassin's Trophy
4 Fatal Push

Legendary Creatures
1 Atris, Oracle of Half-Truths
1 Emrakul, the Promised End
1 Ishkanah, Grafwidow
3 Jace, Vryn's Prodigy
1 Questing Beast
4 Uro, Titan of Nature's Wrath (Banned in Pioneer)

Legendary Planeswalkers
1 Tamiyo, Collector of Tales
1 Vraska, Golgari Queen

Sorceries
1 Extinction Event
4 Thoughtseize
3 Traverse the Ulvenwald

Basic Lands
1 Swamp

Lands
4 Blooming Marsh
3 Breeding Pool
3 Fabled Passage
1 Ipnu Rivulet
4 Overgrown Tomb
2 Watery Grave
1 Zagoth Triome

Sideboard:
1 Scavenging Ooze
1 Tireless Tracker
1 Abrupt Decay
3 Mystical Dispute
2 Unravel the Aether
2 Cry of the Carnarium
1 Extinction Event
2 The Elderspell
2 Unmoored Ego