If there's a cost associated with having a creature attack a player, its controller isn't forced to pay that cost, so it doesn't have to attack that player
Waterbending is a little harder to pin down, but the fact it involves tapping your stuff suggests a more passive, going with the flow playstyle that fits how waterbending is portrayed
Of all the possible commanders spoiled, for me Jon Irenicus seems to be the most interesting
This means Arena is typically easier to get to grips with, as youre less likely to be messed around early on by random chance
Ramp cards are an important part of the deck due to it being five colors
I particularly like the way the leafy, reefy patterns match this Pokmons original inspiration: the Leafy Seadragon