Where is the last magic jar to increase my magic meter to have eight bars?

the old man says come back when you are ready instead of teaching me reflect or any of the last spells… why

help me find out how to get the last majic jar and how to get by the invisible ghosts is there like glasses or something to see them with (if so WHERE)

Hello,
The item needed to see invisible enimies is the cross, and it can be found in the second-last palace at triple eye rock. Play the flute here:
(x marks the spot)
A
A x A
p <– palace appears here

When in the palace, do not fall down; if you do, just keep falling until you get back to the “first” floor, you can’t miss it with the knight statue in the upper right-hand corner (I think that this statue can become a red vial or a red knight, I cannot recall. With all of these statues, it is best to strike them in the head, not the shield, for the best chance at getting a vial. Just leave the room and come back if you get a knight; if you defeat the knight, there will be no other chance of getting a vial) Anyway, back to the cross: keep headed right until you come across the miniboss – a blue knight on his steed. After defeating the knight, collect the key (even though you should have the key from the hidden Kasuto town – there are no keys to be found in this palace) and continue right to get the cross.

As for the magic jars, I believe that there are three: the first one is at the start of the game in the cave below Princess Zelda’s palace, but you need to get the candle first to be able to see. The next one is found by using the hammer on the boulder just to the left of the hammer’s cave and walking over the remaining patch. There is another in the maze area where you also find the kidnapped child and the palace with the boots to walk on water. I think it can be found on the left-hand side of the maze, but I am not sure right now.
Once you have found these, go to the hidden Kasuto town (use the hammer to cut down trees in the forest after the cave passage) and talk the old woman pacing back and forth near the start of the town. She will say that you deserve her help, and you will get the final magic jar after following her inside.

That’s all I can remember for now.
Goodbye,

Dan

Whats the best way to gain exp. points for extra lives once you are down to the final castle?