The narrative of Dark and Light has always been somewhat cryptic. The expansion sought to flesh out the backstory of Gaia, the game's world. It delved into the history of the "Shards"—magical fragments that hold the world together—and the faiths that rise around them. For players who enjoy "environmental storytelling," this DLC added much-needed depth to the game's mythos.
If the modified .exe attempts to connect to official servers (which is unlikely), anti-cheat software like Easy Anti-Cheat (EAC) will flag it immediately, resulting in a hardware ban.
Instead of chasing a risky "Shard of Faith .exe," consider these legal, safe, and often free/cheap ways to play Dark and Light :