light an 'eternal flame' [=a small fire that is kept burning as a symbol to show that something will never end]
I will be 'eternally' grateful for your help.
When will his 'eternal' whining stop?
(..) my property... ...and I myself... ...will carry you to the Gates of Valhalla! Am I awaited? You will ride eternal... ...shiny and chrome. Rictus! Help him aboard! Ready? Here we go! (..)2015 Mad Max: Fury Road
(..) to my Imperator... ...Furiosa! And I salute... ...my half-life War Boys... ...who will ride with me, eternal... ...on the highways of Valhalla. V! V! V! V! I AM YOUR REDEEMER! It is by my hand... ... you will rise (..)2015 Mad Max: Fury Road