Does a character under the effects of Tree Shape count as a tree for the purpose of spells like Tree Stride?
If so, then a druid could use Transport Via Plants to travel through another druid using Tree Shape?
If that's possible, then could a Tree Shaped druid with still spell/silent spell travel through themselves as a tree for the purpose of Tree Stride/Transport Via Plants, effectively transporting to any tree in range, from wherever they can assume Tree Shape?
Tree Shape gives you the form of a tree. It doesn't actually make you a tree, and so Tree Stride would fail.
To all normal tests you are, in fact, a tree or shrub, although a detect magic spell reveals a faint transmutation on the tree.
By moving into an oak tree (for example), you instantly know the location of all other oak trees within transport range (see below) and may choose whether you want to pass into one or simply step back out of the tree you moved into.
A druid using the tree stride spell wouldn't be able to tell if the tree he's trying to teleport to is actually a druid pretending, would he?
If not, would you just say that, for some unknown reason, he can't teleport to that tree, and has to pick a different one, or end the spell?
A druid using the tree stride spell wouldn't be able to tell if the tree he's trying to teleport to is actually a druid pretending, would he?
He would notice that this "tree" is somehow not one he "instantly knows the location of", so he'd be aware that it's no ordinary tree. And if the druid-tree is outside of the tree-strider's visual range, the tree-strider wouldn't even know it exists in the first place.