Kyoshiro was nice enough to list out the best items, so ill use these as an example.
Kyoshiro wrote:
Legendary Thanatos Wings +5 I06H:stwa
Legendary Thanatos Wings +4 I06G:stwa
Legendary Thanatos Wings +3 I06F:stwa
Legendary Thanatos Wings +2 I06E:stwa
Legendary Thanatos Wings I00Q:stwa
Legendary Legion's Sword I00U:srbd
Legendary Satan's Ace I00S:stwa
Legendary Abyssal Sword I00O:klmm
Astral Blade I049:stwa
Astral Armor I03R:stwa
Ring of Existance I018:stwa
Rare Satan's Ace I00R:stwa
Rare Thanatos Wings I00P:stwa
Rare Legion's Sword +2 I067:srbd
Rare Abyssal Sword I00N:klmm
To spawn an item its really, really simple. Take a look at the items above, after the name it says, for example, after Astral Blade, it says
I049. This is the code that you use to spawn (Ignore the letters after it.) So you'd just have to type
-spawn I049, and wherever you have clicked, it will spawn an astral blade.