Sensei's Divining Top + Umori, the Collector + The Reality Chip

Sensei's Divining Top

Umori, the Collector

The Reality Chip

How it works

1. Activate Sensei's Divining Top by tapping it, causing you to draw a card and put Sensei's Divining Top on top of your library.
2. Cast Sensei's Divining Top from the top of your library by paying 0.
3. Repeat

This clever setup allows you to draw your entire deck by exploiting Sensei's Divining Top's unique ability to replace itself on top of your library. While its tap ability normally costs one mana to look at cards, drawing it and putting it back costs zero net mana here because Umori, the Collector discounts artifact spells by {1}. To make playing it from the top of your library possible, you simply rely on The Reality Chip attached to a creature, letting you continuously tap, draw, and recast the Top over and over again.