Hello, I'm Mr. Dark, and (in my metagame anyways) I see a lot of decks with great potential get thrashed, simply because they can't use them. Parasite Worms are a good type for darkness, they have destruction, discard, and power, which the dark type emphasises, rolled up into one group of worms on steroids. With that having been said, I will show you a few tricks for mastering those worms.
First off, start with 3-4 Horrid Worms. They are quick to summon and have a hint of discard,so I usually use one to attack, and one to save. Why save? For the big baddies of the worms- Chaos Worm and the Ultracide Worm. It's best to use this in a combo, like so.
Turn 1:Mana, Marrow ooze
Turn 2:Mana, Bloody Squito
Turn 3:Mana, Horrid worm
Turn 4:Mana, Horrid worm, Attack with first horrid worm.
Turn 5:Mana, Chaos worm the other horrid, use effect, but dont attack with it, use the other horrid worm(If it's still alive) for that.
Turn 6:Mana, Ultracide,Ultracide and (possibly) Horrid Worm attack.
By turn 7, they should die,that is, presuming that you pull that off. That probably won't happen though.
When using the worms, players tend to stray to the offensive side, but ALWAYS keep a blocker handy.If not, your shields will be gone like the wind. Use low levels to stall the 1st two turns so you can get out your worms.
Well that's all,so i will accept any comments(Please no flames, this is my first time) at: Supertrav93@aol.com
Thanks for reading,
         Mr. Dark