Besides the module lands, the borderless Adventures in the Forgotten Realms cards are all planeswalkers: You'll find a total of 5 mythic rare planeswalkers in Adventures in the Forgotten Realms , and 5 uncommon, 1 rare, and 6 mythic rare Dragons
As for the waterbending cost, the additional artifact tokens, creatures and lands really bring the cost down to a manageable amount that is way easier than waiting for the next full moon and put the Secret of Bloodbending on this list as one of scariest things you can pull off
If you control "Toon World": You can Special Summon this card from your hand, then, if you control another Toon monster, you can destroy 1 Spell/Trap your opponent controls
(1) If you control no monsters, or all monsters you control are DARK Synchro Monsters: You can Special Summon this card from your hand
Dockside Extortionist is another pricey reprint announced in the first wave of spoilers
Once defeated, they are exiled and recast as their flip-side permanents at no cost