Zaxara, the Exemplary, Necrotic Ooze, and Morphling

Prerequisites

• Zaxara, the Exemplary in the graveyard
• Necrotic Ooze on the battlefield
• Morphling in the graveyard
• Necrotic Ooze does not have summoning sickness

Steps

1. Activate Necrotic Ooze using Zaxara's ability by tapping it, adding
2. Activate Necrotic Ooze using Morphling's first ability by paying , untapping Necrotic Ooze
3. Repeat

Results

• Infinite colored mana