Thalia never gives up her quest in ascertaining Lisa's whereabouts despite Izzat's stern warning. She tried many dangerous tricks only to summon her. Although, her guarantee to success plans are all miserably fail. Well, it's actually hard to convene Lisa as she knows who Thalia is, and rather than appearing in front of her, Lisa chooses to play hide and seek with Thalia.
First and foremost, what did she do to summon Lisa? The first thing that flashes by her mind is The Spirit of the coin, of course! She prepared the kinds of stuff required for the game in secret, and when all her housemates drifted to the land of sleeping, that's when she executed her plan.