Ad Nauseam
A Modern deck, by Tucker Stocker
3rd place at a tournament in Findlay, Ohio, United States on 2019-03-16
As reported at http://www.starcitygames.com

Maindeck:

Artifacts
4 Lotus Bloom
4 Pentad Prism

Creatures
1 Laboratory Maniac
4 Simian Spirit Guide (Banned in Modern)

Enchantments
4 Phyrexian Unlife

Instants
4 Ad Nauseam
4 Angel's Grace
1 Echoing Truth
1 Lightning Storm
2 Pact of Negation
3 Spoils of the Vault

Sorceries
4 Serum Visions
4 Sleight of Hand

Basic Lands
2 Plains

Lands
4 City of Brass
3 Darkslick Shores
3 Gemstone Mine (Not currently legal in Modern)
3 Seachrome Coast
3 Temple of Deceit
2 Temple of Enlightenment

Sideboard:
4 Leyline of Sanctity
2 Fatal Push
1 Gigadrowse
2 Hurkyl's Recall
1 Pact of Negation
1 Slaughter Pact
2 Bontu's Last Reckoning
2 Thoughtseize