Spellbinder, Great Train Heist, and Sylvan Awakening

Prerequisites

• Spellbinder on the battlefield
• Great Train Heist in exile
• Sylvan Awakening in hand
• available

Steps

1. Cast Sylvan Awakening by paying , causing all lands you control to become creatures with haste until end of turn
2. Deal combat damage with the creature that has Spellbinder attached, triggering Spellbinder
3. Holding priority, activate any number of creatures and/or lands you control by tapping them, adding at least
4. Resolve the Spellbinder trigger, casting a copy of Great Train Heist without paying its mana cost, and choosing to pay an additional to select its first mode, causing you to untap all creatures you control and to get an additional combat phase after this one
5. Repeat from step 2 each combat phase

Results

• Infinite storm count
• Infinite combat phases
• Infinite mana lands you control can produce
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce
• Infinite magecraft triggers
• Infinite untap of lands you control
• Infinite combat damage