The vampire class can recharge his blood charges easily, though. So it makes sense his fast healing should be weaker. This guy has a defined amount per day (which isn't
nearly as big as the typical vampire's blood charge pool, either). Awesome pic, BTW.
Cool class, too!
Plant traits are actually worth a dip into it by themselves, and the ability to create spawn is awesome. Worryingly so, in fact. This guy could have a pet wizard
and pet druid, each one level lower than him, on retainer, and go enslave new ones whenever his old ones die. So... a two level dip into this is like getting all the best parts of Thrallherd 10, plus plant traits.
As-is, this class is extremely powerful. If you allow Thrallherds in your game, this class should be OK. However, Thrallherd is regarded as one of the most powerful PrCs in the game, just a bit behind things like Planar Shepherd and Incantatrix (although you could have one each of those as your Thralls
).
I'm kind of torn, to be honest. Spellcasters are unlikely to go this route, as it costs them two caster levels (but plenty of people play Thrallherds...). So this is really going to mostly impact non-casters, who could use the boost. I'd feel better if this class was actually longer... and didn't grant the ability to get two thralls of your ECL-1 till after eating more levels, to discourage casters from taking it.
Maybe turn that ability into a feat (which you can't take till 6th level, like Leadership, and give it some drawback which will deter casters... ), or make a PrC for this class which gets it as the capstone?