Younger viewers might find the mummies, zombies and monsters scary, despite being cheaply made. The film's bad sound makes the roaring sound scary.
A few jumpscares. (Though they are poorly timed)
The only genuinely scary part of this film comes early on in the movie where a child is being choked to death fairly graphically by one of the villain's minions.
Some may object to two sequences in the movie which veer suddenly and without warning into religious proselytism (for Islam and Christianity, respectively), and the fact that a set-piece battle uses a genuine ancient Christian church as a backdrop.