Alright, I think I've got something. I chose these three requirements:
1. Must cost at least $7000 USD, not foiled out. Total cost is $ 10583.46
2. Must have 3 different win conditions, and each one is used against a different player.
3. Use draws spells and tutors to go through the the deck.
Here is the
game plan.
Step one of this deck is to use the massive amounts of tutors and draw spells to find your combo pieces. You need to generate infinite mana, using one of these combos.
1.
Isochron Scepter+
Dramatic Reversal: there are lots of ways to tutor for these pieces, so it's easy to set up. Then you just need a couple of artifacts that tap for mana.
2.
Deadeye Navigator+
Palinchron/
Peregrine Drake: Repeatedly
flicker Palinchron/
Peregrine Drake for infinite land untaps.
3.
Phantasmal Image+
Palinchron:
Phantasmal Image copies
Palinchron, and then can return to your hand.
4.
Power Artifact+
Grim Monolith: this generates infinite colorless, so go for this one last.
Next, to take out three people in different way.
Version 1
Cast Oona. Pour 100 mana into her ability and mill someone out. Preferably a mono-colored deck, because you'll need the faeries for the second part.
Version 2.
Hopefully you got enough faeries to deal 40 damage, because you're going to use them to attack another person. Sadly they don't have haste, so you'll have to wait a turn, which is incredibly
dangerous.
Version 3.
Now, use Oona's ability on yourself. Mill your whole deck, which causes
Narcomoeba to pop out into play.
Unearth Dregscape Zombie, and then cast
Gravecrawler. Flashback
Dread Return by sacrificing all three, and bring back
Laboratory Maniac. Then Flashback
Deep Analysis to win. All of this was assuming that you lost all those faeries somehow. Oherwise, sacrifice three of them to cast
Dread Return.
Three opponents, three different ways. The only issue, is that method 1 and 3 are ways to win on their own.
https://deckstats.net/decks/82803/1118187-deck-request-oonaIs this what you wanted?