Lrien Revealed Three cards for five mana is an acceptable rate, if not particularly exciting
My only gripe is that Incubators are currently linked to the Phyrexian creature type, and since theyre phased out of existence for the foreseeable future, it makes it much less likely well see the mechanic again
The multiple-rare possibility means you're not completely locked into a single rare slot, which is a meaningful upgrade from the old Draft Booster guarantee
If you can turn them into lands, such as with Ashaya, Soul of the Wild, or maneuver their abilities onto land creatures, you can untap either druid and a land infinitely
This is standard pracitce, but if you want to see the details of this, see the Jupyter notebook here