We can certainly see its shadow on these dragon's presence basic lands
Thats where its protection from white and black come in, letting it dodge both blockers and removal
Flawless Maneuver is a card that also grants this keyword, but at instant speed
Heart of Kiran Heart of Kiran saw quite a bit of play when it was in Standard, and I could see it coming back again in the right deck
Unstoppable Ash While not technically a Treefolk lord, this card hailing from Morningside certainly suits Treefolk decks perfectly due to its triggered ability that boosts your all of your creatures toughness by five whenever they get blocked, which will aid Treefolk creatures greatly as they already hold high toughness across the board as a creature type
There's some confusion on social media given the way that the original announcement was worded in the MTG Arena State of the Game article a couple of weeks ago, and in a previous Arena Announcement article