This is a beginner friendly cube. All cards should be easy to understand. This means there are no dual-faced cards, cards with mechanics that require out of game objects (tokens, the initiative and so on) and cards with set mechanics that aren't fully explained on the card.

Massive preference for cards with up to date wordings.

The cube is intentionally "bad" in that there are pretty large power discrepancies between the worst and the best card in the cube. I think the individual colors and two color pairs are still relatively balanced between each other.

Lifegain
Card draw / Bounce
Graveyard
Burn/noncreature spells
Ramp