Teleport the necronlord close to the warp portal change into the night bringer and unleash all hell.
Get a night bringer and pariahs.
All are good at diffrent things Tau: Great for long range but not much else Tyranids: Great for swarming in close and personal and ripping them up Chaos: Good all round troops well balanced for beginners Necrons: Think you kill them they get back up! damn things don't die! They have great leadership as are robots Overall id say necrons or tyranids. i personally prefer necrons but that is just me.
Kill kill bill bill
Theoretically, any faction can team up with another, as long as you have a good enough reason. Technically, Necrons and Chaos are enemies, so they would never 'team up', per se, but one could create a feasible story in which they both work to exterminate the Imperium. They wouldn't be working 'together' (because Necrons would kill any living thing--including Chaos Marines--on sight) but they would have the same goal.
the main aim was to kill Muslims to clean their souls.
Invasion and mass murder. God commands us not to kill.
Mephiles did kill Sonic but Sonic was later resurrected with the power of the Chaos Emeralds and a kiss from Elise. He killed sonic by coming out of the ground and and blasting him with the power of the purple choas emerald (sneak attack).
Do win he had to kill Saladin, take Jerusalem, and get more troops and supplies.
Kill dark beasts or just buy it
no
You have to kill all the cats in the Dark Forest (Again!)
Man who kill fly in dark accomplish anything.