Lucien, Voice of the Beyond

Whenever a spirit enters the battlefield under
your control, put a possession counter on
Lucien, Voice of the Beyond.
{1}{w}{b}{t} Sacrifice a spirit: remove X possession counters from Lucien, Voice of the Beyond and
deal X to target player. You may activate this
ability only once a turn and only as a sorcery.

"Speak to us, Spirits!"