Just 2 quick questions:
1. Assuming I get hit by Rule by Decree and have to discard down to 4. I have 2 Darkstars in my hand and I choose to discard them. The 1st comes into play but what about the 2nd? Does it get discarded or can I play it as a dup on the one I've already played?
2. My opponent plays Seductive Promise and 'steals' my Mammoth Riders. At the end of the phase, does Mammoth return to my hand or his? I assume it's mine.