耍花招 is a separable verb (离合词) that means 'to play tricks' or 'to deceive'. It is composed of the verb 耍 and the noun 花招. When you need to insert a measure word, modifier, or aspect marker, you split it: 耍了花招 (played a trick), 耍个小花招 (play a little trick), or 耍什么花招 (what tricks). It can also mean 'to show off a special skill', especially in acrobatic or circus performances, but the deceptive sense is more common.