(EDH) looking for unique cards

[Varatius]

So i've been busy making unique decks that use a card that you would not normal see in game.  I was hoping somebody could help me find more cards that are unique and can either be an alternate win condition by itself or be a combo that can be a win con if anyone knows of cards like this other than Azors Elocuters (i already made a deck like this) i would love to hear your suggestions and if you'd like when it's done i can message you the deck list.

[WWolfe]

Probably one you've thought of but Liliana's Contract. I've thought about redoing my Shadowborn Apostle deck to capitalize on it.