Mummy Pinball

Make the spinner counter in the top right of the table go down to zero. (Must be done with one ball or it resets)

Activating Multiball on the Mummy Table is pretty simple and likely you'll manage to do so while playing naturally as long as you're somewhat adept at keeping a ball going around the board.

On the far right side of the table, just above your upper right flipper, there's a Spinner in the far right lane. This is the Emperor's Wrath spinner, which counts down starting at 50. Simply send your ball through the spinner enough times to count down to 0 (one pass may drop the counter multiple digits, depending on speed of the ball at the time).

You can either send the ball up the lane from your left flipper (probably the most power and therefore most speed when entering spinner), bounce the ball off the left side of the table with a shot from your right flipper (much harder to hit and a slower speed, resulting in less progress), or send the ball up between the bumpers at the top and let the ball come down the lane from there (speed depends on path of ball before entering lane; hitting the right bumper at the right angle may send it down the lane quickly, or it might just barely roll down).

Of course, as usual, Multiball awards good points so it's useful for reaching higher score towards all those score-related achievements.