Whether this is a result of the game being too new to have the complexity of its older competitors or because it wants to stay accessible is hard to say
All you need is index cards, rubber bands, and a scissors
The boosters are in acrylic cases which I got from Cardotaku
If you can find them at MSRP, snap them up, but you should be prepared to pay a fair amount for each

1 Wildcard of any rarity A common (4.2%), uncommon (74.1%), rare (16.7%), or mythic rare (2.6%) from the Magic: The Gathering | Avatar: The Last Airbender main set An uncommon scene card (less than 1%) A rare or mythic rare scene card (less than 1%) A rare or mythic rare field notes card (less than 1%) A rare or mythic rare battle pose card (less than 1%) A rare or mythic rare elemental frame card (less than 1%) A mythic rare borderless double-faced Saga card (less than 1%) 1 Rare or mythic rare A rare (80%) or mythic rare (12.6%) from the Magic: The Gathering | Avatar: The Last Airbender main set A rare (1.6%) or mythic rare (less than 1%) scene card A rare (1.4%) or mythic rare (less than 1%) field notes card A rare or mythic rare battle pose card (less than 1%) A rare (2.4%) or mythic rare (less than 1%) elemental frame card A mythic rare borderless double-faced Saga card (less than 1%) 1 Traditional foil card of any rarity A common (53.9%), uncommon (36.7%), rare (6.7%), or mythic rare (1.2%) from the Magic: The Gathering | Avatar: The Last Airbender main set An uncommon scene card (less than 1%) A rare or mythic rare scene card (less than 1%) A rare or mythic rare field notes card (less than 1%) A rare or mythic rare battle pose card (less than 1%) A rare or mythic rare elemental frame card (less than 1%) A mythic rare borderless double-faced Saga card (less than 1%) 1 Land card A non-foil common dual land (40%) A non-foil default frame basic land (20%) A non-foil Avatar's journey basic land (10%) A non-foil Appa basic land (10%) A traditional foil common dual land (10%) A traditional foil default frame basic land (5%) A traditional foil Avatar's journey basic land (2.5%) A traditional foil Appa basic land (2.5%) 1 Non-foil DFC helper card or double-sided token Note: Percentages may not sum to 100 due to rounding

Kaya, meanwhile, needs a little help to really stick around