Just as the title says. Hardmode is suppose to be the Nightfall of raids, so let's make it a true Nightfall.
If you wipe, you get sent back to orbit and lose your checkpoint. Do what you will with the Burn.
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You know that something like that is probably planed to be put in place. Look at the format of the game it is a set of increasingly more difficult task. For mission it is base mission the hero difficulty the daily heroic for strikes it is normal then weekly then night fall so would it be surprising if they made something like this.