God summoning would be so awesome. I can picture it in front of me.
You, the adventurer, are travelling to a dark fortress. Goblins are used to adventurers travelling to their homes to kill a few of their offspring and guards and then leave, but they were soon to be surprised that this adventurer has different plans.
This adventurer didn't come for bloodshed, not that of the goblins atleast. No, the adventurer is carrying human corpses with him, or pieces of them. He's planning to summon Amzo'kush, the god of death.
On arrival, he speaks to the high priest, the high priest accepts the proposal and so the ritual began. Parts were chucked in the water, a new born child was sacrificed on the altar, its blood decorating the walls.
While the adventurer was placing the corpses in a circle'ish way, the high priest was reading from the book of darkness.
Suddenly, the earth starts to shake, the walls start to crumble and you hear a large crack before getting knocked out because part of the roof came down. 'What went wrong?', you think by yourself when, just before you passed out, you saw that nothing went wrong. Something dark emerges from the blood filled pool.
After a few hours, you wake up again, only to see that the sky has turned dark, whilst not being night. No, this was something different, this was a different kind of darkness.
Upon arriving in the nearest Goblin Tower, you see that everything has been slaughtered. Goblins were ripped, limp from limp. The corpses of the slaves looked even more disgusting. Upon entering the world map, you travel to the nearest Dwarven civ, only finding death and destruction there as well.
This is what you wanted, death, destruction and a creature to fight against, oh yea, this is DF
Sorry, I got carried along >.> But still, I would love being able to summon gods and demons and stuff