Necrotic Ooze, Heroes' Bane, and Crystalline Crawler

Prerequisites

• Necrotic Ooze on the battlefield
• Heroes' Bane in the graveyard
• Crystalline Crawler in the graveyard
• Necrotic Ooze has power 5 or greater
• available

Steps

1. Activate Necrotic Ooze using Heroes' Bane's ability by paying , putting at least five +1/+1 counters on it
2. Activate Necrotic Ooze using Crystalline Crawler's first ability four times by removing four +1/+1 counters from it, adding
3. Repeat

Results

• Infinite +1/+1 counters on Necrotic Ooze
• Infinite colored mana