Learn Italian: Voglio che tu faccia questo dramma.

The phrase voglio che (I want that) expresses a strong desire or will. In Italian, when you want someone else to do something, you must use che followed by the subjunctive mood. Since the subjects are different (I want vs. you do), the subjunctive is triggered.

How is the subjunctive form faccia created from the infinitive fare?

Fare is a highly irregular verb. Instead of building off its modern infinitive, it uses its ancient Latin root (fac-) to form the present subjunctive. You add the typical subjunctive endings to this root, which is why the forms for I, you, and he/she are all faccia.

Is it necessary to include the subject pronoun tu in this sentence?

It is highly recommended for clarity! In the present subjunctive, the singular forms (I, you, and he/she) are entirely identical. If you just said voglio che faccia questo dramma, it could mean I want him/her to do this drama. Adding tu removes the ambiguity.

Since dramma ends in an -a, why does it use the masculine adjective questo instead of questa?