4C Heal (MA*Y)

0018a3a0: 27bdffe8 addiu r29,r29,0xffe8     |
0018a3a4: afbf0010 sw r31,0x0010(r29)       |
0018a3a8: 0c061725 jal 0x00185c94           |-->Store MA and Y XA = Attacker's MA and YA = used Ability Y
0018a3ac: 00000000 nop                      |
0018a3b0: 0c062216 jal 0x00188858           |-->Magical XA * YA Modify XA (M Att Up and Compatibility), Set TCA HP damage (XA*YA)
0018a3b4: 00000000 nop                      |
0018a3b8: 0c061cd4 jal 0x00187350           |-->Undead Reversal Switch HP damage to HP recovery if Target isn't undead
0018a3bc: 00000000 nop                      |
0018a3c0: 8fbf0010 lw r31,0x0010(r29)
0018a3c4: 27bd0018 addiu r29,r29,0x0018
0018a3c8: 03e00008 jr r31
0018a3cc: 00000000 nop

Return location

Battle.bin
0018b97c - Pre Formula Setup