Essense of the wild, Tokens and Nykthos

[Dan Turner]

I have essence of the wild in play

cast a card that gives me 6 tokens

do the tokens have the mana cost of the essence of the wild?

If I play a llanowar elf will it have the (2)(G)(G) cost or the (G)

[Koby]

Copy effects take on the following card characteristics:

706.2. When copying an object, the copy acquires the copiable values of the original object's characteristics and, for an object on the stack, choices made when casting or activating it (mode, targets, the value of X, whether it was kicked, how it will affect multiple targets, and so on). The "copiable values" are the values derived from the text printed on the object (that text being name, mana cost, color indicator, card type, subtype, supertype, rules text, power, toughness, and/or loyalty), as modified by other copy effects, by "as . . . enters the battlefield" and "as . . . is turned face up" abilities that set characteristics, and by abilities that caused the object to be face down. Other effects (including type-changing and text-changing effects), status, and counters are not copied.

Therefore, each of your creature enters the battlefield as a Essense of the Wild and take on its mana-cost as well (:3::g::g::g:). Each creature then contributes three green devotion for those effects.