You have a way to kill a creature before your combat phase.
Your deck size is equal to or greater than the largest deck size among your opponents minus the number of +1/+1 counters on Walking Archive and The Ozolith.
Steps
1Cast Body of Research by paying , creating a 0/0 Fractal creature token and then putting a number of +1/+1 counters on it equal to your deck size.
2Kill the Fractal, triggering The Ozolith, moving the Fractal's counters onto The Ozolith.
3At the beginning of your combat phase, The Ozolith triggers, moving its counters onto Walking Archive.
4At the beginning of each opponent's upkeep, they will draw cards equal to the number of counters on Walking Archive. This should result in them drawing from an empty library either during their upkeep or their subsequent draw step, and thus losing the game.