Dual Casting, and Toils of Night and Day

Prerequisites

• Dual Casting on the battlefield
• Toils of Night and Day in hand
• available

Steps

1. Cast Toils of Night and Day by paying
2. Holding priority, activate a permanent by tapping it, adding at least
3. Activate the creature with Dual Casting attached by paying and tapping it, copying Toils of NIght and Day
4. Resolve the copy of Toils of Night and Day, untapping the mana-producing permanent and the creature with Dual Casting attached
5. Repeat from step 2

Results

• Infinite magecraft triggers