The main selling point is the ability to make 2 Mana out of a single treasure token, which is super strong
One thing Id like to mention up front: Ezuri will make a great commander for a deck that focuses hard on +1/+1 counters or poison counters, and I wont dig deep into that aspect, since its pretty easy to search for cards that support either one of those strategies
They feel authentic, with fantasy elements implied in the flavor text rather than the focus
The basic idea is that people record the items theyre looking to get rid of, and the audience can bid on what they want to buy
They wanted to highlight Magics iconic creature types while showing off some historically iconic cards but failed in both regards
They also have dedicated land support with Haven of the Spirit Dragon, Crucible of the Spirit Dragon, and Temple of the Dragon Queen, making it easy to support a 5-color dragon deck