Temple of TriumphAdam and Nelson are playing in a Standard GPT. Adam taps his 3 Mountains and Temple of Triumph to cast Chandra’s Phoenix and Chained to the Rocks. He exiles Nelson’s Arbor Colossus with his Chained to the Rocks, and attacks for 2 with his Chandra’s Phoenix while putting the Chained to the Rocks on his Temple of Triumph. Two turns later, you walk by the match and notice Chained to the Rocks enchanting the Temple of Triumph.

What do you do?

Judges, feel free to discuss this scenario on Judge Apps!

[expand title=Answer]Thanks to everyone who participated in this week’s Knowledge Pool!

As everyone mentioned, this is a Game Rule Violation for Adam and a Failure to Maintain Game State for Nelson.

To determine the remedy in this scenario, let’s refer to

Originally posted by IPG 2.5:

If not caught within a reasonable time frame, or backing up is impossible or sufficiently complex that it could affect the course of the game, the judge should leave the game state as it is after applying state-based actions and not attempt any form of partial ‘fix’ – either reverse all actions or none, with the following exceptions:

•If a player made an illegal choice or failed to make a required choice for a permanent on the battlefield, that player makes a legal choice.

A complete back up would be too complex, as two turns have passed and many decisions may have been made. Thus, we will fix the current game state by applying the State-Based Actions: Chained to the Rocks is put into Adam’s graveyard, which will return the Arbor Colossus from exile.

The GRV Partial fix referring to an object on the battlefield with an illegal choice does not apply to this scenario. The choice mentioned in the Partial fix refers to a choice mentioned explicitly by the card. An example of a choice can be seen from the card Voice of All.[/expand]