Nissa of Shadowed Boughs, Felidar Guardian, Yarok, the Desecrated, and Ashnod's Altar

Prerequisites

• Nissa of Shadowed Boughs on the battlefield
• Felidar Guardian in the graveyard
• Yarok, the Desecrated on the battlefield
• Ashnod's Altar on the battlefield
• Nissa has at least 6 loyalty counters
• You control at least four lands

Steps

1. Activate Nissa's -5 to put Felidar Guardian onto the battlefield from the graveyard
2. Using its ETB blink Nissa and a land
3. Nissa and the land both enter putting 2 loyalty counters on Nissa
4. Sacrifice Felidar Guardian to Ashnod's Altar for
5. Repeat

Results

• Infinite colorless mana
• Infinite ETB
• Infinite landfall triggers
• Infinite LTB