Cliffy81's ANT
Action
1 Ad Nauseam
1 Past in Flames
1 Tendrils of Agony
1 Empty the Warrens
Cantrips
4 Brainstorm
4 Ponder
4 Preordain
Search
4 Infernal Tutor
1 Wishclaw Talisman
Interaction
4 Thoughtseize
4 Duress
1 Ad Nauseam
1 Past in Flames
1 Tendrils of Agony
1 Empty the Warrens
Cantrips
4 Brainstorm
4 Ponder
4 Preordain
Search
4 Infernal Tutor
1 Wishclaw Talisman
Interaction
4 Thoughtseize
4 Duress
Mana
4 Dark Ritual
4 Cabal Ritual
4 Lion's Eye Diamond
4 Lotus Petal
Lands
1 Bloodstained Mire
3 Misty Rainforest
4 Polluted Delta
1 Bayou
1 Tropical Island
2 Underground Sea
1 Volcanic Island
1 Snow-Covered Island
1 Snow-Covered Swamp
4 Dark Ritual
4 Cabal Ritual
4 Lion's Eye Diamond
4 Lotus Petal
Lands
1 Bloodstained Mire
3 Misty Rainforest
4 Polluted Delta
1 Bayou
1 Tropical Island
2 Underground Sea
1 Volcanic Island
1 Snow-Covered Island
1 Snow-Covered Swamp
Sideboard
2 Chain of Vapor
1 Massacre
3 Echoing Truth
1 Tendrils of Agony
1 Carpet of Flowers
2 Veil of Summer
2 Flusterstorm
2 Abrupt Decay
1 Fatal Push
2 Chain of Vapor
1 Massacre
3 Echoing Truth
1 Tendrils of Agony
1 Carpet of Flowers
2 Veil of Summer
2 Flusterstorm
2 Abrupt Decay
1 Fatal Push

I think this might have been my first Legacy Challenge. Definitely had a blast and hope to get to play a few more soon.
Humorously enough, due to the results of the last match a friend of mine snuck into Top 8 and went on to win the whole event.