Oona Fast Combo EDH (EDH / Commander)

This EDH Deck is designed to win on turn 3. However, in a format with 99 Cards in your library, only a consistency of about 20% to 30% is possible. From my estimation while deck-testing, however, winning on turn 4 happens at a consistency of about an additional 30 to 40 percent. Additionally, there seem to be 1 or 2 counterspells castable when the deck goes off on turn 4 or later.

To achieve this consistency, the deck includes a lot of abusive cards. With a Necropotence you should "draw" up to 30 cards (do not go below 10 life if your opponents have any chance to interact). Due to the low mana curve (in average ~1,0), it is possible to draw about 20 to 26 cards with Ad Nauseam. because of the 0-Mana-Ramp, you almost always win when you cast one of these on turn 2 or 3 or even later.
Colored Mana is an issue, that's why we play Rain of Filth, Dark Ritual, Mana Confluence, ...

Combos:

• Isochron Scepter + Dramatic Reversal (don't hesitate to cast one without a combo if you have access to another combo)
• Grand Architect + Pili Pala (attacking with Pili Pala on the previous turn lets this Combo cost only 1uu instead of 1uuu, also grand architect is excellent ramp as it has no summoning sickness. Pili Pala fixes your Mana.)
• Power Artifact + Grim Monolith / Basalt Monolith (Backup Combo as you play the monoliths anyway, but appeared to be easily tutorable and makes up for a very stable colorless combo. Remember you need at least 4 colored Mana to cast oona and exile one player's library, which is almost always enough to win the game.)

Be careful with Demonic Consultation.
Brainstorm is THE first card to put there, the last one can be Timetwister as it gives you ~3-4 turns.
Play Demonic Consultation only when you are missing a single Combopiece - Too risky to exile the other one. The about 7% chance of ending up with your whole library exiled is worth 93% of definite wins if you cast it carefully.

Last of all, Mulligans:
Mulligan aggressively. This deck needs about 5 cards to set up a turn 1 win if you are lucky ;-)

Make sure your playgroup plays decks that begin to interact with you on turn 3 latest. Otherwise, you will just win.

Have fun!

tobto