Derevi, Empyrial Tactician, Emiel the Blessed, and Incubation Druid

Prerequisites

• Derevi, Empyrial Tactician on the battlefield
• Emiel the Blessed on the battlefield
• Incubation Druid on the battlefield
• Incubation Druid does not have summoning sickness, and has at least one +1/+1 counter on it
• You control a mana-producing land

Steps

1. Activate Incubation Druid by tapping it, adding
2. Activate Emiel by paying , blinking Derevi
3. When Derevi enters the battlefield, it triggers, untapping Incubation Druid
4. Repeat

Results

• Infinite LTB
• Infinite ETB