Mono-White Devotion
A Pioneer deck, by Medvedev
5th place at a tournament in Magic Online on 2020-06-17

Maindeck:
17 Plains

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

Creatures
4 Knight of the White Orchid
4 Thraben Inspector

Enchantments
2 Baffling End
1 Gideon's Intervention
4 Stasis Snare

Legendary Creatures
2 Anafenza, Kin-Tree Spirit
1 Tomik, Distinguished Advokist

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

Legendary Planeswalkers
3 Gideon of the Trials

Lands
1 Castle Ardenvale
3 Idyllic Grange

Legendary Lands
4 Nykthos, Shrine to Nyx

Sideboard:
4 Damping Sphere
2 Baffling End
4 Elspeth Conquers Death
2 Isolate
2 Gideon, Ally of Zendikar
1 Castle Ardenvale