How will it work if I cast a card for its bestow cost (like Celestial Archon) and the creature I target is destroyed in response (or exiled/bounced,...).
Do I still get the creature or is the whole thing countered?
When asking about previewed cards, you must include a link to a card image on wizards.com. Here's Celestial Archon. -Carsten
Based on how it's worded it would end up in the graveyard for having an illegal target.
However do note that the new rules and faq's have not yet been released for this new mechanic, so I can only base my answer on how the rules apply to aura spells currently.
Do I still get the creature or is the whole thing countered?
When asking about previewed cards, you must include a link to a card image on wizards.com. Here's Celestial Archon. -Carsten
However do note that the new rules and faq's have not yet been released for this new mechanic, so I can only base my answer on how the rules apply to aura spells currently.