Elite Arcanist, and Energy Arc

Prerequisites

• Elite Arcanist on the battlefield
• Energy Arc in exile

Steps

1. Activate any number of creatures by tapping it, adding at least
2. Activate Elite Arcanist by paying and tapping it, copying Energy Arc and casting the copy without paying its mana cost
3. Resolve the copy of Energy Arc, untapping all creatures you control
4. Repeat

Results

• Infinite storm count
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce
• Infinite magecraft triggers