Combo result
Any creature is gained control of and subsequently destroyed once the next creature enters the battlefield. Prerequisites
Merieke Ri Berit does not have summoning sickness and untapped, and Intruder Alarm both on the battlefield.
Merieke Ri Berit + Thornbite Staff
Combo result
Destroys as many creatures on the battlefield as you want. Prerequisites
Merieke Ri Berit does not have summoning sickness and untapped. Thornbite Staff attached to Merieke Ri Berit. A source that can untap Merieke Ri Berit once.