Can you cast Counterspell (with no other spell to target, potentially targeting itself) to trigger Ravenbloom's ability that cares about spells being played?

Ruling: No, you cannot use Counterspell to boost Ravenbloom. A countered spell does not count as being played.

Nuances:

• While you can technically cast Counterspell on itself (since the spell is already on the chain when you choose targets), this interaction won't trigger Ravenbloom because countered spells are treated as not having been played
• This targeting rule may be subject to future changes as it is considered unintuitive