What are "attack" Spells?
Bind Monster and Shriveling are both Attack Spells.  Just under the title of the card is the phrase, Spell, Attack.

Bind Monster will stun the target while Shriveling will do a good amount of damage if you pass the test to cast them.

Gloria Goldberg can start with Bind Monster while Harvey Walters can start with Shriveling.  Otherwise you will have to gain the spells during play by reading a tome.