Im a fan of using a doomed or useless creature to draw cards and ramp mana
While pure control decks wont want most of this stuff, basically everyone else can get value from it
I thought the set number was the only way to differentiate the two, completely missed the color of the e
C Common Night Assailant X DARK Level 3 [ FiendFlipEffect ] ATK 200 DEF 500 FLIP: Target 1 monster your opponent controls
Using Digi-Parts and the stat boosts from leveling up, Digmon, Tylomon and Quetzalmon can easily be made to start with 1,110 HP, netting HP Fever
In my many attempts to make a deck that revolves around the use of Spell Counters, I've found it nearly impossible to do so without using cards from another archetype (Lightsworn, Spellbook, etc) to make a decent engine