Spellbinder + Great Train Heist + Sylvan Awakening

Prerequisites

• Spellbinder attached to a creature that can attack this turn and that cannot be blocked by an opponent.
• Lands and creatures you control can tap to produce at least .

Steps

1. 1Cast Sylvan Awakening by paying , causing all lands you control to become creatures with haste until end of turn.
2. 2Deal combat damage with the creature that has Spellbinder attached, triggering Spellbinder.
3. 3Holding priority, activate any number of creatures and/or lands you control by tapping them, adding at least .
4. 4Resolve 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. 5Repeat from step 2 each combat phase.

Effects

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