Kitsa, Otterball Elite, and Mobilize

Prerequisites

• Kitsa, Otterball Elite on the battlefield
• Mobilize in hand
• Kitsa does not have summoning sickness
• Kitsa has power 2 or greater
• Creatures you control can tap to produce at least
• available

Steps

1. Cast Mobilize by paying
2. Kitsa's prowess ability triggers, giving it +1/+1 until end of turn
3. Holding priority, activate any number of creatures by tapping them, adding at least
4. Activate Kitsa's second ability by paying and tapping it, copying Mobilize
5. Resolve the copy of Mobilize, untapping all creatures you control
6. Repeat from step 3

Results

• Infinite untap of creatures you control
• Infinite mana creatures you control can produce
• Infinite magecraft triggers