Kitsa, Otterball Elite + Great Train Heist

Prerequisites

• Kitsa does not have summoning sickness.
• Kitsa has power 2 or greater.
• Creatures you control can tap to produce at least .

Steps

1. 1Cast Great Train Heist by paying at least , choosing its first mode and optionally its second and/or third modes.
2. 2Kitsa's prowess ability triggers, giving it +1/+1 until end of turn.
3. 3Holding priority, activate any number of creatures by tapping them, adding at least .
4. 4Activate Kitsa's second ability by paying and tapping it, copying Great Train Heist.
5. 5Resolve the copy of Great Train Heist, untapping all creatures you control and causing you to get an additional combat phase after this one if it is your combat phase, along with any other mode(s) that were chosen.
6. 6Repeat from step 3.

Effects

• Infinite combat phases
• Infinite magecraft triggers
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control
• Infinitely powerful creatures you control until end of turn