You can discard multiple sets of cards during the same Power Up phase if you like.
For example, discarding a pair of 4s and also three 7s would entitle you to search
for a total of three Aces. You can even discard a pair of Aces or a pair of Jokers to
get an Ace, though it would be an unusual move to do so.- from the rulebook.
So an example: Lum has 5,5,5,6,10, A. During powerup, Lum discards the three 5s to search for 2 aces. [here's the questionable part] Lum uses those 2 aces to powerup for one ace. Lum now holds 6, 10, A, A and his top 2 discards are the other 2 aces. After powerup he plays Poker Flourish for 4-of-a-kind. The same situation could happen if Lum hit with a 3-4-5-6 combo to get the 2 aces to start this process.
The people I were playing with say this is illegal because you aren't supposed to be able to use aces you just searched for to power up for more aces. I can't find this ruling in the book. Is it that you can only power up once but may use multiple pairs at once to do so, meaning you can't power up and THEN power up again?
Finally, if this is so, then how come Lum is allowed to do exactly this in the online version of the game?