Dual Casting, Toils of Night and Day, and Twinning Staff

Prerequisites

• Dual Casting on the battlefield
• Toils of Night and Day in hand
• Twinning Staff on the battlefield
• Dual Casting attached to any creature you control without summoning sickness
• A permanent that can tap for
• available

Steps

1. Cast Toils of Night and Day with any targets
2. Pay and tap the creature enchanted with Dual Casting to copy Toils of Night and Day, targeting the creature enchanted with Dual Casting and a permanent that can tap for
3. Twinning Staff triggers, creating a copy of Toils of Night and Day
4. The copy targets at least the permanent
5. Allow the first copy of Toils of Night and Day to resolve
6. Tap the permanent for
7. Repeat steps 2-6

Results

• Infinite colored mana
• Infinite untap