noun
juju
JOO-joo/ˈdʒuːdʒuː/
A magical force believed to affect people or events.
The player credits the charm's juju for the favorable roll of the dice.

Etymology
The suggested link to French joujou, “toy, plaything,” is uncertain. The recorded use for an object of religious veneration connects the word with the spiritual power attributed to such objects.
In context
ask me to make Juju so they could become invisible
More examples
- He believes the old coin brings good juju.
- They blame bad juju for the team's losing streak.
- We need a little juju to turn our luck around.
Forms
juju