Turns one intangible
The Atravesandus Spell is a spell that allows the target to pass through solid objects.
Jerry teaches this spell to the kids in "Art Museum Piece" using his hockey stick as an example by sticking it through Max. Alex then uses this spell on herself to make her go through the museum wall and out to Harper's jewelry stand. Jerry and Max also use it to play football in the house and make the ball go through things. However, the ball ends up in the soup that Theresa eats, resulting in her being temporarily affected by the spell.
Alex uses this spell in "Who Will Be The Family Wizard" to escape from the labyrinth.