One-drops that have utility late are powerful and versatile cards
The Hero is a 2/2 that churns out 1/1 dorks for your gold spells while the Dryad is just a 1/1 but it gets counters as you cast stuff that's White, Blue, Black, or Red
This is great with Quintorius Kand's discover four, allowing you to slide past the six-mana dog and hit the cards you really want to hit
Scions & Spellcraft Scions & Spellcraft has one of the best commanders of the year, Y'sthola, Night's Blessed, but the deck itself needs work
For example, its pretty obvious Huntmaster of the Fells is a human hunter during the day, and a frightening werewolf who stocks the fells at night
Some Energy cards have to be decent on their own, otherwise Energy is a completely parasitic mechanic on a bunch of weak cards that need each other in order to do anything