Once per turn, during your next Standby Phase after this card was banished: You can Special Summon this banished card, then if "Numeron Network" is in your Field Zone, inflict damage to your opponent equal to the combined ATK of all banished Xyz Monsters
The number you'll want for each card type really depends on the kind of deck you're building, but a nice starting point is a 15 Pokmon, 15 Energy, and 30 Trainer split , and then you can work your way out from that
Most players at the table can deal with high-value cards like the ones mentioned above, but they quickly start to get overwhelmed once you get two triggers per spell
And if so, must I pay its cost during the next turn
After all, the game will only provide two free boosters every two hours