Dear Rulers,
We have decided to perform a functional erratum on Decay of the Machines so as to avoid any confusion when it comes to ruler cards from outside the game. With the erratum, revealed ruler cards from outside the game can no longer be put into the graveyard.
Errata on GRV-050 Decay of the Machines
Old Wording:
[Quickcast]
You may put up to two revealed cards from outside the game into their owners’ graveyard. Draw a card.
New Wording:
[Quickcast]
You may put up to two revealed non-ruler cards from outside the game into their owners’ graveyard. Draw a card.