Helix is nasty either in decks that apply pressure to race Burn, or in decks that try to stabilize until bigger threats hit the battlefield
Supporter Pokmon come in all shapes and sizes
It ramps an opponent, but it answers just about anything efficiently and decisively
(Thanks, Skullclamp and Arcbound Ravager!) But the part of Darksteel Colossus that really caught my attention was the brand-new mechanic: indestructible
The Titan alone can ramp you from 6 to 8, but the land tutoring has many implications in different formats, since you can choose between Slayers' Stronghold, Field of the Dead, or Valakut, the Molten Pinnacle, using your various lands as a toolbox
A year or so ago, I put together a mono-red deck that relied on looping the three extra turn spells available: Final FortuneFinal Fortune, Last ChanceLast Chance, and Warriors OathWarriors Oath