"R: After you discard 2 or more momentum as a cost for an ability, add the top card of your deck to your momentum."

does this mean that everyone time I discard 3 momentum I may play the response to gain 1 more momentum to play around with the Powerful keyword?

please clarify your question, its not at all clear what your trying to ask

Yeah, I have no idea what you're asking here.

so like I'm playing the Powerful keyword of Rolling Buckler Uppercut. Powerful 1 and it starts as a mid 3 for 3 damage. what if I started to discard momentum to make it stronger and get to discarding the 2nd momentum to the cost of Powerful, then can I play the R to gain 1 more momentum and continue discarding 2 momentum continuously and constantly gaining 1 more momentum each time?

No, you discard all the momentum to pay a cost at once, you don't discard one at a time.

cool cool, just wanting to get that detail out of the way..