THIS IS NOT FOR PRO PLAYERS, JUST FOR NEWBIES
NOTE: SOME NEWBIES PLAY MCC SO THIS WOULD HELP
The Power-Drain is a type of ability in Halo 3, thus draining the enemy’s shield and your shield too if in contact with the Power-Drain. This can also be used for vehicles too, basically an EMP for any type of vehicle.
To easy kill a player with a Power-Drain, you must throw it at the player or somewhere near the player thus, draining their shields and pulling them tours it. Now, if you want them to die quicker, let their shield drain out and pull out either a Battle-Rifle, Magnum, or anything else that one shots in the head with a bullet. The enemy will fall but you must be careful NOT to get close to the Power-Drain, you don’t want to be killed too!
Now, get in there and finish the fight.