Bubbling Cauldron, Desecration Demob

[Lordgrimlock]

If I sac to bubbling cauldron at the beginning of combat does it tap Desecration Demon?

[Zellius]

No because the sac is a cost to cause him to tap similar to how the sac is a cost to the bubbling cauldron as well so you would need to sac two to have both effects take place