There are thousands of tools you can use in the craft ...herbs, crystals, wands, athames, runes and more but to do a quick and simple spell all you need is just a candle.
This is good information if you're on a budget and your craft supplies are limited, or if you're just not feeling like getting all of that stuff out and cleaning it all back up.
The reason a candle is all you need is because it itself already represents all four of the elements.
The candles wax represents the Earth. The melted wax represents Water. The flame represents Fire, and the smoke represents Air.
The candle represents all four of the elements by itself.
To use it you just hold the candle firmly with both hands and focus all of your intentions into it. Charge it with your energy.
Then you just take a match and light it and watch the flame dance around.