now..

Take a piece of coal, it better be a piece of coal you've found in between the ashes of a dead tree you've set on fire during midnight.

And draw this demonic diagram inside your Pentagram:

Pay close attention to all the details.

This is enough to summon 3 Exogenous Demons and 2 Endogenous ones.
Don't worry, they'll not show up until you cast the final spell.

Have in mind that it is just a simple practice to begin with. we've choose 3 and 2, so each of them will take shelter in one angle of the pentagram, and they'll be busy dealing with themselves, so you have a chance to take a look at them.

now...

Please pay close attention my friends...

To summon the first Exogenous Demon, use this spell:

You have to read it out loud 7 times, to summon all 3 Exogenous Demons.

Each time use a different index number , like x1 = ... X2 = ....

When you've finished the 7th spell, the Exogenous Demons will appear all at once.

The Exogenous Demons may look something like this. ( but it depends on the nature of Xs you use )

Well.. now..

DO NOT let them wander around.

To summon the Endogenous ones, use this spell accordingly :