I really like how this set is using green's mana production abilities to fuel a lot of mana sinks. In this case, mana sinks includes using the pseudo-blink theme and recasting ETB creatures. Ramping into fatties doesn't have to be the only use of green's mana.
Is Sunshower Druid any good? We haven't seen 1/3 for 1 mana very often, so that's mildly interesting, and adding a +1/+1 on ETB for one mana is also kinda interesting when you have a blink theme. My current cube is too aggro heavy, so I might not mind having something like this to defend early and use synergistically later in the game.
Edit:
Also, I like the druid because adding a +1/+1 counter is a useful but not devastating ETB effect, and that's where I want ETB effects to be.
That brings up this other card that I sort of like:
I like how this adds artifact and enchantment removal to a cube while acting as a more versatile blink target than something like
Reclamation Sage. It's lower powered, but not woefully so.