All 3rd edition assassin spells of 4th level.
“Clairvoyance, sometimes known as Clairaudience/clairvoyance, was a divination spell that allowed...Clairaudience/clairvoyance
“Greater invisibility or improved invisibility was an illusion spell that functioned exactly like...Greater invisibility
“Freedom of movement is a common abjuration spell that allows the subject to move normally...Freedom of movement
“Glibness was a transmutation spell that altered the caster's speech, making his or her elocution...Glibness
“Modify memory was an enchantment spell that changed up to 5 minutes of the subject's memory. ↑...Modify memory
“Poison was a necromancy or alteration spell that inflicted a debilitating and possibly fatal...Poison (spell)