This card is excellent in a Preston Fairmont deck, taking advantage of his base value of 1 in each skill. Since he's likely to be mitigating those with cards like Dark Horse and Lola Santiago, Preston can use this on a skill test that he's likely to pass and still put several tokens in the bag.
Asigna esta carta solo a una prueba de habilidad que estés realizando, y solo si la dificultad de dicha prueba es mayor que el valor básico de tu habilidad.
Después de que asignes la Señal de la cruz a una prueba de habilidad, añade X fichas a la bolsa de caos. X es la diferencia entre la dificultad de la prueba y el valor básico de tu habilidad.
Double Quick Learner + double Drawing Thin + Signum Crucis on a base shroud 4 for example adds 10-[base intellect] bless tokens(you might miss the fact that it's still comparing to your base value, your passive buffs or commited icons do not change this). Pretty sick.
And why would I wanna do this you ask? Because Ancient Covenant is extremely strong, and the more people in your team that can take it the more attractive this gets.
Repeatable with Silas on high shroud locations for a steady stream of lots of bless tokens. Since it takes effect after being committed rather than after resolution, Silas can reap the benefit turn after turn. Maybe you'll even start succeeding on some of those investigates!