Beleth's and Blandine's Servitors may not take celestial form while on earth. How do they every ascend without incurring dissonance (since they must first attain celestial form before ascending)?

Deja vu! As with Blandine's Servitors. .

. Once within a Tether, they may ascend safely, without dissonance. Also, if they sleep and ascend to the celestial realm via the Towers of Dreams or Nightmares, they may dissolve their vessels back into potentiality.

See Superiors 3. Kyriotates may also reach the Marches via sleeping within a host. More.

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