Primaris is normally free if all powers come from a single source.
Chaos powers only require you to take a single power to gain it.
Thus you are no longer eligible for another free primaris.
When rolling for powers declare which tree it is for, once you roll then you can pick to either take the primaris or the power you rolled. You can pick from any tree it says they are eligible for.
The answers for that are clear in the Chaos codex and the
brb.
Automatically Appended Next Post: nosferatu1001 wrote:The conjuration rules state specifically that they Deep Strike and are counted as having come from reserves. So they must count as swooping
You can roll one die at a time, as nothing states you must do otherwise.
Doesn't really say deep strike reserves and this is a hotly debated subject.
Your better off summoning a demon prince without wings so you can avoid the debate and actually get to use the damn thing before the game ends.