It creates a base of 4 gems, boosted by 3 for each knight. The vanilla version creates a base of 3 gems, boosted by 3 for each knight, so the upgrade gets you a total of one extra gem.
so only 1 gem total, not one for each knight?
Nothing to do with boost ratio.
Base spell creates 3 gems plus 3 per each knight troop;
Shiny spell creates 4 gems plus 3 per each knight troop.
that makes sense, so its more crap then
It actually feels like the shiny spell upgrade with by far the highest impact, it significantly raises the chance for an extra turn.
even though i misunderstood the spell to begin with. i have been saving my shiny keys specificly for journey troops. i figured it would make them more annoying to fight in GW
If boost ratio also goes up by 1 it will be too op (20 gems created each cast)