I have been thinking abotu cards to run with Nightmare (I have hope for the poor dude). Thougth of a strange line-up but I am sure it could use a few tweaks here and there. Mostly focused in blowing stuff up with throws and making sure they deal 4 damage by increasing their damage with a few cards enough for Partial Blocking.

This is what I have come up with so far by a Fire line up:

-Character
Nightmare. (Death/Evil/Fire) (6 HS, 26 HP)

-Actions (5)
1 Hunger for Souls (Death/Evil/Fire) (3/5 +2M)
4 Summoning Evil (Chaos/Death/Evil) (3/5 +2L Breaker:1)

-Assets (0)

-Attacks (16)
4 Body Slam (Death/Fire/Earth) (6/3 +2M Throw)
4 Crushing Embrace of the Jotun (Death/Earth/Fire) (5/3 3M5 Desperation:4-Throw)
4 Fierce Twin Slash (All/Fire/Order) (6/3 4M5 Multiple:1-Weapon)
4 Leg Slash (Death/Evil/Fire) (4/3 +2H 3L5 Breaker:2)

-Foundations (41)
4 All Life is Prey (Death/Evil/Fire) (2/5 +3L)
4 Brooding (Death/Earth/Fire) (1/5 +3H)
4 Communing with the Ancients (Air/Chaos/Fire) (3/5)
2 Driven by Fear (Air/Chaos/Fire) (2/5 +3M)
4 Enraged Golem (Earth/Evil/Fire) (3/5)
4 From the Mouse, Humility (Air/Fire/Good) (2/5 +3L)
4 Hope for One's People (Fire/Good/Order) (0/5 +3H)
4 In Search of Plunder (Death/Earth/Fire) (2/5 +3M)
4 Intimidating Presence (Death/Evil/Fire) (2/5)
1 Memories that Stain its Armor (3/4 +4M)
4 Nursing a Grudge (Air/Fire/Good) (2/5)
2 The Azure Knight (Death/Evil/Fire) (3/5 +3H)

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(No side deck as of yet)

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63 Cards

Difficulty:

0 = 4

1 = 4

2 = 22

3 = 16

4 = 4

5 = 4

6 = 8

Control:

1 = 0

2 = 0

3 = 16

4 = 1

5 = 45

How it works:

-Only one check 4, so you either get a really good check of 5 for your attacks or a cursed 3.

-The throws are your good friends. "Crushing Embrace of the Jotun" only needs +2 damage to deal at least 4 damage (using "In Search of Plunder" or 2 "Broodling"; heck, even "All Life is Prey" with "Driven by Fear" or other stuff blowing your own stuff up). On the other hand, "Body Slam" can use only one Broodling and it will deal at least 4 damage. Everything assuming you are not up against damage reduction.

-Seriously, you won't run out of attacks easily. You have "Nursing a Grudge" to pick up your throws back from your discard pile, and "From the Mouse, Humility" to pick up your stuff from your momentum (and at the same time, deal with opponent's momentum).

-"Summoning Evil" is a very fun card to play around with. "Nursing a Grudge" I can use again, I don't explode something for "Intimidating Presence," "Memories that Stain its Armor" I can reuse... Plus it has a Breaker which never hurts.

Issues:

-I don't know if its bad luck, but I keep drawing too many attacks...

-I have huge issues with Stun. May need to try out "Perfect Sense of Balance" by Death.

-Attack line up not sure how. "Fierce Twin Slash" I added for its Multiple since I need use for the momentum in case I don't draw "From the Mouse, Humility".

-Very hard to block against Life. Check the block modifiers...

Stuff to try out:

-Was thinking of "Flexible Body" for 'easy blocking,' give another extra use to "Summoning Evil" and give more use to my momentum. Still thinking about it.

So, thoughts on how to fix this?

Flexible Body is definitely hotness if you can get it.

If you can get them, Stand Off is head-and-shoulders better than In Search of Plunder.

I'd probably cut Fierce Twin Slash for something with a block, although... I dunno. It works really well with Nightmare (since if either goes through, they lose foundations, and if you push 'em up to 7 dmg they have to full-block or lose foundations). And, like you said, momentum outlet.

I would definitely add Stand Off, but right now its getting near impossible to obtain (everybody wants 'em).

And for Fierce Twin Slash, that's the main reason why I have them; I still don't know what to fit in for it. Midnight Launcher is out of the question; no block, no keyword and I need an attack already in play to use it. Have had bad experience with it...