The Crystal Energy Poison Tree's missing one thousand HP couldn't be restored and could only be replenished with a Crystal Core.
Not to mention, the Crystal Energy Poison Tree, while blocking this kind of severe weather, was also continuously losing HP, needing timely replenishment with Crystal Cores.
Maintaining the existence of the barrier already involved a slow consumption of HP. Blocking bad weather meant even more continuous loss of HP. If it encountered enemy attacks, that would mean another drain of HP... This kind of consumption might not seem too great, but one has to realize that once this barrier is activated, it basically never gets turned off. Over time, the accumulation of this consumption is incredibly alarming!
