Sensei's Divining Top + Crystal Skull, Isu Spyglass + Gran-Gran

Sensei's Divining Top

Crystal Skull, Isu Spyglass

Gran-Gran

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 loop turns a modest artifact into an endless engine by leveraging the passive vision of Crystal Skull, Isu Spyglass to always know when your topdeck is ready. By tapping Sensei's Divining Top to draw a card and place itself back on top of your library, you set up the exact condition needed to cast it again for free—a cost reduction happily enabled by Gran-Gran, provided you've met its graveyard requirement. Gran-Gran also doubles as a loot trigger when tapped, while Crystal Skull, Isu Spyglass can alternatively tap for blue mana, letting you churn through your entire library and skyrocket your storm count with absolute ease.