Deadpool, Trading Card, Enduring Courage, and Devoted Druid

Prerequisites

• Deadpool, Trading Card in hand
• Enduring Courage on the battlefield
• Devoted Druid on the battlefield
• available

Steps

1. Cast Deadpool by paying
2. As Deadpool enters, have its text box be swapped with Enduring Courage's text box
3. Kill Deadpool by any method
4. When Deadpool dies, it triggers, returning itself from your graveyard to the battlefield as a noncreature enchantment
5. As Deadpool enters, have its text box be swapped with Devoted Druid's text box
6. Activate Deadpool by tapping it, adding
7. Activate Deadpool by putting a -1/-1 counter on it, untapping it
8. Repeat from step 3

Results

• Infinite green mana