RNGesus (or whatever you want to name them) is real and a prominent member of the godly pantheon. Fail a check? As a member of the faith, you can request a re-roll of an kind once a day, but in return RNGesus will command you re-roll something else (at the GM’s discretion). Don’t get greedy for divine intervention, because that clutch Nat 20 which just saved your ass might might get nullified…