It looks like the phrase is a bit unclear. It could be:
In the end, it was Silver who came up with a plan to defeat Lyra. Using his knowledge of the ancient magic that flowed through Tendoys, he devised a strategy to channel the energy of Crystal Lake against Lyra and her dark forces. silver+prisoner+v10+tndoys
The suffix does not appear in official game documentation but suggests several possibilities common in niche digital communities: "silver+prisoner+v10+tndoys" It looks like the phrase is a