23 Heal (MA*Y)

[23]
0018967c: 27bdffe8 addiu r29,r29,-0x0018    |
00189680: afbf0010 sw r31,0x0010(r29)       |
00189684: 0c061e44 jal 0x00187910           |-->Katana Break Chance  Roll Break chances (Wepon Power%), update Attacker current action special flags
00189688: 00000000 nop                      |
0018968c: 0c061725 jal 0x00185c94           |-->Store MA and Y XA = Attacker's MA and YA = used Ability Y
00189690: 00000000 nop                      |
00189694: 0c06195a jal 0x00186568           |-->XA * YA Calculation Multiply Ability XA and YA and store the result as HP damage
00189698: 00000000 nop                      |
0018969c: 0c061cd4 jal 0x00187350           |-->Undead Reversal -->Switch HP damage to HP recovery if Target isn't undead / Else Nullify 0x80193860
001896a0: 00000000 nop                      |
001896a4: 8fbf0010 lw r31,0x0010(r29)       
001896a8: 27bd0018 addiu r29,r29,0x0018     
001896ac: 03e00008 jr r31                   
001896b0: 00000000 nop

Return location

Battle.bin
0018b97c - Pre Formula Setup