The "enchanted" parts is because they hardly make legendary lands anymore (e.g. even the guildhalls from original Ravnica weren't legendary!)

Original Ravnica was 10 years ago and they've changed the legend rule since then. Really, original Zendikar block is when it was most obvious, but they've started making legendary lands again. All the DFC lands in Ixalan block, for example, or Hall of Heliod's Generosity. It's still fairly bad gameplay to have a legendary land

Well, legendary and enchanted could be themed together. It's a similar idea to historic - maybe something like:

> Splendid lands you control [...]. (Anything legendary, enchanted or enchantment is splendid.)

FWIW, I wanted something that made "all" lands permanently critters of significant size, but figured a) turning all lands into big critters would push the cost higher than what I intended b) that's asking for disaster in the face of mass removal (making them indestructible felt way over the top...) c) there's not that many options when defining a subset of land types.

and that's how I got to this somewhat quirky result. I'm not saying it's especially good or anything, but at least I like the johnny part of the result.

To make them 3/3 would probably need to cost a bit more, yeah.
­Living Plane Nature's Revolt are both smaller than this.