no, no, no, no, and no.
this is not something that 'ends the turn'.
the only thing related to 'end of turn' is that usually happens at the end of turn.
thus, abilities cannot be used again.
In this mechanic, 'the nova-effect (about to generate singularity)' should not reset either.
Note that I'm not saying this can't be a good way to make this card work, it's just not a 'card update'.