Bifdel, Dungeon Master

When Bifdel enters the battlefield, create three colorless Soulstone artifact tokens with indestructible & "Whenever a creature dies, if no creature haunts this artifact, you may exile that creature haunting this artifact."
You may cast creature cards that haunt
Soulstones you control.
{w}{u}{b}: Bifdel gains all abilities of a creature that haunts your Soulstone.