The most powerful decks of the past formats have been those capable of setting up a checkmate situation (Yata), swarming the field with monsters (Teledad, Lightsworn), or just executing a combo to leave the opponent without resources (Wind Up, Infinity w/Thrishula)
At first I threw in Hells Caretaker to represent that aspect of mythology
Although it has a low HP of 300 as compared to other VMAX cards, and only one ability
Delighted Halfling Delighted Halfling is one of the strongest mana dorks ever printed
The crackling magic, the thunderous chantingthe urge to turn and run replaced all his curiosity
Chandra, Torch of Defiance is the Swiss Army Knife of red planeswalkers, and can fit well into almost any deck