(11/10/2020) Although the tokens created by Najeela's first ability are attacking, they were never declared as attacking creatures (for the purposes of abilities that trigger whenever a creature attacks, for example)
If you arent playing with a friend, let your opponent know ahead of time that you have a custom card in your deck
Plus, once more cards start entering and circulating in the secondary market, many of these inflated prices should drop significantly
Once it taps to take something, the opponent only gets it back if Merieke leaves or untaps and then that creature gets destroyed instead
If your goal is to pull Mega Greninja ex specifically, booster boxes are still a gamble singles of the SIR are already widely available and, for most collectors, will end up being the more cost-effective route to owning the card