Mystic Forge + Sensei's Divining Top + Cloud Key

Mystic Forge
Sensei's Divining Top
Cloud Key

Requires
All permanents on the battlefield. "Artifact" chosen with Cloud Key.
Steps
  1. Activate Sensei's Divining Top by tapping it, drawing a card and then putting 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
Results
Infinite card draw. Near-infinite storm count.