Rite of Passage, Kami of Whispered Hopes, and Walking Ballista

Prerequisites

• Rite of Passage on the battlefield
• Kami of Whispered Hopes on the battlefield
• Walking Ballista on the battlefield

Steps

1. Activate Walking Ballista by removing a +1/+1 counter from it, dealing 1 damage to itself
2. Rite of Passage triggers, putting two +1/+1 counters on Walking Ballista
3. Repeat an arbitrarily large number of times
4. Move to the next turn, removing all damage marked on Walking Ballista
5. Activate Walking Ballista by removing a +1/+1 counter from it, dealing 1 damage to any target
6. Repeat step 5 as desired

Results

• Infinite colored mana
• Infinite damage
• Infinite +1/+1 counters