Mono-White Devotion
A Pioneer deck, by MatiCheto
1st place at a tournament in Magic Online on 2020-06-16

Maindeck:

Artifact Creatures
4 Arcanist's Owl
3 Walking Ballista (Banned in Pioneer)

Creatures
3 Knight of the White Orchid
4 Thraben Inspector

Enchantments
2 Baffling End
2 Elspeth Conquers Death
2 Stasis Snare

Legendary Creatures
2 Anafenza, Kin-Tree Spirit

Legendary Enchantment Creatures
2 Daxos, Blessed by the Sun
4 Heliod, Sun-Crowned

Legendary Planeswalkers
2 Gideon of the Trials
4 Karn, the Great Creator

Basic Lands
18 Plains

Lands
2 Castle Ardenvale
3 Idyllic Grange

Legendary Lands
3 Nykthos, Shrine to Nyx

Sideboard:
1 Damping Sphere
1 Glass Casket
1 Grafdigger's Cage
1 Pithing Needle
1 Tormod's Crypt
1 Cataclysmic Gearhulk
1 Walking Ballista (Banned in Pioneer)
2 Baffling End
1 Elspeth Conquers Death
2 Gideon's Intervention
1 Skysovereign, Consul Flagship
1 The Immortal Sun
1 Gideon of the Trials