If Nadu leaves the battlefield and returns to the battlefield in the same turn, or if Nadu leaves and another Nadu appears, the triggered ability granted by the new one is different than the triggered ability granted by the old one
On one hand, this is definitely an effective solution to prevent scalping and those trying to break the rules while also making the job for the staff easier On the other hand, I can understand why people wouldnt want to be recorded and have their face scanned in a data base that can easily be compromised I think a better system (imo) would be a NY transit gate system
The other attack does 280 damage, which is often enough to deal with two prize Pokmon with less HP
The Dragons rare version, Smaug, Wicked Worm, continues this trend, presenting one of the best Treasure Commanders MTG has ever seen
Some of those cards are used in the infamous Simic Flash deck, which dominated Standard and maintains a powerful position in the current Historic meta