I have only gotten my cup of ace from a gold pack and winning by deck out against the AI josh. I have tested it 10 times and 2 of the 10 i have gotten my cup of ace. Have yet to get a cup from any other AI from a deck out than Josh.
I've been meaning to test this, keep forgetting. I have a feeling every SD (well, the GX-exclusive SD's would share with their DM counterparts) has a unique drop. Would explain why some cards like Hungry Burger, Abyssal Designator and Cup of Ace are rarer than the other cards.
Rare indeed. I get more RNG UR drops from SD than I do the Cup of Ace card. It kinda sucks the difficulty because a mill deck is my next build. I have every card except the 3rd cup of ace. It's a grindy process and hell i don't even know if my strategy even works or if it was just pure luck.
Aj
