Does a character suffer negative effects from using a Wish spell cast from a magic item?

Question

One of my characters recently received the luck blade magic item with 2 wishes in it. The description of the luck blade (DMG, p. 179) states:

Wish. The sword has 1d4–1 charges. While holding it, you can use an action to expend 1 charge and cast the wish spell from it. This property can't be used again until the next dawn. The sword loses this property if it has no charges.

The spell is cast from the item.

Would my character suffer the negative effects of wishing for anything besides duplicating another spell, since it states the spell is cast from the luck blade?

Answer 1

The luck blade (DMG, p. 179) says:

you [...] cast the wish spell from it.

The wish spell may be cast from the blade, but you are still the one casting it. Therefore, you would still suffer the negative effects of wishing for anything besides copying a spell:

The stress of casting this spell to produce any effect other than duplicating another spell weakens you. [...]

The same applies to any other magic item that says "you cast" the wish spell from it.

Answer 2

In a quote, "It is not hands that summon us. It is desire!"

Powerful uses of the Wish spell are exceptionally strenuous as spelled out in the spell. Whether you are casting it from a scroll, from a ring, from a magic sword, or even straight from your mind all that matters is you are casting it and that kind of mojo has a price.