How to Make Money Training Magic in RuneScape

Lunar Spellbook Method

To cast Humidify you first need to buy As many Astral, Water, and Fire runes as you feel comfortable with (you could also use a steam staff or water staff).

Buy as many Empty Vials as you can.

Go to the bank and withdraw all your Astral, Water, and Fire runes. Fill the rest of your inventory up with your Empty Vials.

Click the Humidify spell then click on one of your vials. One spell cast will fill all of the vials in your inventory.

When the vials are full just deposit in your bank, withdraw the Empty ones and repeat.

Magic Training Arena Method

Invest a chunk of cash into runes, don't worry you will make profit never the less. The goal here is to be able to buy full infinity using your "MTA" points.

Go to the grand exchange and buy around 12000 Law Runes, around 15,200 Nature Runes, and around 270,000 Cosmic Runes. This might seem like a lot but you will make profit and experience. You also might want to invest in some elemental staffs or else you will need the second runes to cast some of the spells.

Travel to the "MTA". There are rooms where you perform a certain task. You want to use your Cosmic Runes in the Enchanting room. Always enchant with your highest enchant spell for maximum experience.

Go to the Alchemy room. You will see what looks like bank deposits but in fact you withdraw stuff from them. It's recommended withdrawing some from every stall. Once you have a good amount of stuff you will see a thing at the bottom of your screen that will say an item. You should alch this item as it gives you the most points, and points are very important to the money making process. You should use up about half of your nature runes here until you have enough points.

Go to the graveyard room. In this room you take some damage but the object is to pick up bones and turn them into bananas. You can eat the bananas to heal but to get points you must deposit the bananas in the middle. When all your natures are gone you should have enough points from this room.

The last room is the telegrab room. In this room there is a statue in a maze and you must use your telegrab spell to move it to the middle. Moving it to the middle gives you points.

Once all your runes are gone you should have enough points to buy Full Infinity. After all is done and you sold your infinity you should have made a couple million gp and gained a hefty amount of experience.

Bones to Bananas Spell

Locate yourself near an easy to access bank. You'll want one in an area with little or no lag in a world that will give a good connection (low-ping) and wield your staff of earth.

Use the bank to fill your remaining inventory with bones (26) and cast the bones to bananas spell.

Access your bank, deposit the bananas and withdraw more bones.

Repeat until out of bones. This method gives 647 per inventory (5 inventory's can be managed in a minute) depending on the rapidly fluctuating price of bananas and bones. Giving this method a profit of 194k/hour.