Belfry Spirit

Flying
Haunt (When this creature dies, exile it haunting target creature.)
When this creature enters or the creature it haunts dies, create two 1/1 black Bat creature tokens with flying.

The List

RNA Guild Kit

Flying
Haunt (When this creature dies, exile it haunting target creature.)
When Belfry Spirit enters the battlefield or the creature it haunts dies, create two 1/1 black Bat creature tokens with flying.

Guildpact

Flying
Haunt (When this card is put into a graveyard from play, remove it from the game haunting target creature.)
When Belfry Spirit comes into play or the creature it haunts is put into a graveyard, put two 1/1 black Bat creature tokens with flying into play.