A permanent or card in another zone with no name (including face-down creatures, ____________, and ones whose name Stet has decided to fully delete) can't begin with the same letter as anything else. If _______ is exiled this way, Stet won't deal any damage. Similarly, Stet won't deal damage to any creature with no name, no matter what card was exiled.

Use whatever name or names a player commonly goes by to determine what their current name is and if they should be dealt damage.