Forum:Caam, Serentiy of Gusto

If Necrovalley is faceup on the field as well as Caam, Serenity of Gusto... and i have the correct gustos to activate her effect.... can i still activate??

Does Caam work under Necrovalley?? Does shuffling 2 gustos to the deck a cost or an effect?? does shuffling 2 gustos to the deck target??

can you explain??

PLease create a ruling page about this if posible??