I've found a Purple Astral which is Regeneration, which can regain actually 20% of damage dealt, happens 10% of the time.
Before, I had a Blue Astral which was Heal Blessing, and I've get it at 600 HP regain 10% of the time after each attack (or defense, whatever I don't remember). My knight hasn't good PATK, and I wonder if Heal Blessing is finally stronger than Regeneration? I had more HP with my Bless than with regeneration.
Normal? My knight isn't good enough for Regeneration?
Until ur PATK gets higher Regen Astral may actually give less HP than the Heal Astral as it's 20% of damage regained. Some of these "odd" Astrals really don't come into play until ur stats & lv are much higher & you have more astral slots open. Focus more on the "core" Astrals such as PATK, PDEF, MDEF, HP etc. then the "odd" astrals effects get amplified & using of 2 or more of these can create a deadly combination
To go along with what Elf said you have to remember what the 10% chance means. If you hit an AoE attack of 8 times, you don't have an 80% chance of getting healing. You have a 10% chance 8 times.
IMO the odds of getting the healing make the astral fairly useless until one of your last two astral spots.