Checks how much health the prey has, and supports the comparisons EQUAL, GREATER_OR_EQUAL, GREATER, LOWER and LOWER_OR_EQUAL. Only reason to expect a
FALSE value is if you for whatever reason want a NOT_EQUAL comparison.
Comparison - Lets you pick the comparison mode between EQUAL, GREATER_OR_EQUAL, GREATER, LOWER and LOWER_OR_EQUAL.
Health Value - Lets you pick a health value to compare against between 1.0 and 20.0 (1.0 = half a heart).
Digest Effect in order to only start digestion if the player is on low health. For this you would need a LOWER_OR_EQUAL comparison with a max health value set to whatever you want, for example 4.0 for 2 hearts.