Chthonian Nightmare and Peregrine Drake on the battlefield.
You have at least one energy counter.
You control up to five lands that can tap to produce at least ({2} magic symbol) ({B} magic symbol) ({B} magic symbol) .
Steps
Activate up to five lands by tapping them, adding at least ({2} magic symbol) ({B} magic symbol) ({B} magic symbol) .
Activate Chthonian Nightmare by paying at most ({E} magic symbol) , sacrificing Peregrine Drake and returning Chthonian Nightmare from the battlefield to your hand, returning a creature with mana value 1 or less from your graveyard to the battlefield.
When Chthonian Nightmare enters the battlefield, it triggers, giving you ({E} magic symbol) ({E} magic symbol) ({E} magic symbol) .
Activate Chthonian Nightmare by paying ({E} magic symbol) ({E} magic symbol) ({E} magic symbol) ({E} magic symbol) ({E} magic symbol) , sacrificing a nontoken creature with mana value 1 or less and returning Chthonian Nightmare from the battlefield to your hand, returning Peregrine Drake from your graveyard to the battlefield.
When Peregrine Drake enters the battlefield, it triggers, untapping up to five lands.