$0302BC - Spell usability routines for the menu; indexed to by spell ID
	$30488 - Stona routine; if target is not Stoned, spell cannot be used

	$304A6 - Exit Routine:
		-Loads [[2000584]]; if zero, Exit cannot be used
		-Loads [varMem+0x619]; if nonzero, Exit cannot be used (probably for unwarpable dungeons?)

$0304DC - Spell routines for the menu

	$3081C - Stona routine; clears Stone

	$3083C - Exit routine; stores 0x4 to varMem+0x618, 0x1 to BattleMem+0x56F8
		-Indexes to caster's data, loads spell's MP cost and subtracts from caster's MP
			-This is the only time Exit's spell data is read!
		-Stores 0x1 to varMem + 0x614
		-And so, you're exited


$03A1A8 - Routine for out-of-battle healing spells
	-Base amount healed = (spell base + INT)
	-Depending on spell ID, amount healed is then multiplied by 1, 2 or 3
	-If spell ID is larger than 0x1C, amount healed = 0