Featuring cards used in under 3% of cubes.
Before we get started, some background: This cube initially started as a 1% cube, but ultimately that proved too restrictive. There just weren't enough cards to fill out a 540 card cube - or much of a 360 card cube for that matter - that were used in less than 1% of cubes. Expanding to 3% allowed for much stronger and broader less common cube cards that I still feel comfortable in creating a cube with that will allow players to play with rarely cubed cards.
Mid-range Beatdown & Trample Matters
Self-mill Undergrowth
Drain and Gain
Discard for Value
Spells
Mill and Steal
Traditional Control
Go Wide Tokens
Artifact Aggro
Lands Matter