Battle of Wits

At the beginning of your upkeep, if you have 200 or more cards in your library, you win the game.

Sol Ring

Arcane Signet

{T}: Add one mana of any color in your commander's color identity.

Rusko, Clockmaker

When Rusko, Clockmaker enters, conjure a card named Midnight Clock onto the battlefield.
Whenever you cast a noncreature spell, put an hour counter on each permanent you control named Midnight Clock. Each opponent loses 1 life and you gain 1 life.