06 AbsHP (Weapon)

No Elemental mechanics
No Proc
Undead reverse
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00188cf4: 27bdffe8 addiu r29,r29,-0x0018    
00188cf8: afbf0010 sw r31,0x0010(r29)       
00188cfc: 0c062144 jal 0x00188510           |-->Physical Evade Calculation If Abillity is evadeable roll Ability Evade bytes against Ability base Hit
00188d00: 00000000 nop                      |
00188d04: 14400009 bne r2,r0,0x00188d2c     #If Attack hits
00188d08: 00000000 nop                          |
00188d0c: 0c0616a7 jal 0x00185a9c               |-->Base_XA_Calculation Set XA and YA (Based on Weapon Type)
00188d10: 00000000 nop                          |
00188d14: 0c0617e0 jal 0x00185f80               |-->Charge Calculation Add Power Charge to XA
00188d18: 00000000 nop                          |
00188d1c: 0c0621a9 jal 0x001886a4               |-->Damage Calculation Modify XA (Support-Statuses-Compat-Critical Hit), Might add Knockback, Set TCA HP damage to XA*YA
00188d20: 00000000 nop                          |
00188d24: 0c061c92 jal 0x00187248               |-->HP Absorption  Add HP recovery to Attacker action / Manages undead reversal mechanics
00188d28: 00000000 nop                          |
00188d2c: 8fbf0010 lw r31,0x0010(r29)       END
00188d30: 27bd0018 addiu r29,r29,0x0018     
00188d34: 03e00008 jr r31                   
00188d38: 00000000 nop

Return location

8018b97c - Pre Formula Setup (link)