Win Cons:

- Infinite Mill with Oona
- Infinite Mana with Exsanguinate.
- Infinite Mana with Stroke of Genius to deck out an opponent.
- Exile an opponent's library using the Leyline of the Void/Helm of Obedience combo, where if you have one in your opening hand, it's pretty easy to tutor for the other one. Also, Leyline of the Void doubles as some graveyard hate for this deck.

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Infinite Combo:

1. Basalt Monolith + Rings of Brighthearth + Sensei's Divining Top = Infinite mana and infinite card draw.
2. Basalt Monolith + Rings of Brighthearth + Voltaic Key + (Any artifact) = Infinite mana and infinite untaps of any artifact (notably: Planar Portal for infinite tutors, Myr Turbine for infinite tokens, and Lux Cannon to destroy any number of target permanents.)
3.  Basalt Monolith or Grim Monolith with Power Artifact. You can also do this with Basalt Monolith and Rings of Brighthearth and 2 extra mana for the Rings copy to untap the Basalt Monolith.

http://www.mtgsalvation.com/forums/the-game/commander-edh/204377-infinite-combos-database-now-looking-for?page=5#c126

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Original: http://www.mtgsalvation.com/forums/the-game/commander-edh/multiplayer-commander-decklists/216043-competitive-my-favorite-ant-oona

More info:
http://www.mtgsalvation.com/forums/the-game/commander-edh/multiplayer-commander-decklists/216522-oona-queen-of-the-tutors

http://www.mtgsalvation.com/forums/the-game/commander-edh/forum-1-vs-1-commander-decklists/205916-compendium-1v1-competitive-decks

http://www.mtgthesource.com/forums/showthread.php?23284-EDH-Oona-Queen-of-the-Fae

http://www.mtgthesource.com/forums/showthread.php?23093-Discussion-Most-broken-Commander

- Ultimate Addons:
Marsh Flats
Misty Rainforest
Scalding Tarn
Verdant Catacombs