6 Darkrai A Sinister Legendary While one Darkrai focuses on stunning your opponent by putting them to Sleep, Darkrai ex can dish out damage from the safety of the Bench
Once per turn, during your Main Phase, you can change 1 face-up Attack Position monster your opponent controls to face-up Defense Position
By fast mana, I mean methods to get ahead of the curve early in the game, most likely on turn 1
The best sac outlets come on a cheap card, have no extra cost to use such as a tap or mana, have no speed restrictions upon their use, and are repeatable
Terastodon is even more iconic, letting you convert any three noncreature Permanents into three-power Elephant tokens
This decks strategies are a little all over the place in my opinion