Jumpstart boosters also double as another avenue for WotC to introduce new cards into Eternal formats like Commander
Jace, the Mind Sculptor was the one and only time we had put four abilities on a single Planeswalker (okay, okay, Garruk Relentless/Garruk the Veil-Cursed had fourwell, five, actually, but that was over two sides)
Especially in long EDH games where youll have mana to spare, and your opponents will likely have more than one enchantment to destroy
Not all systems are equal
You can keep chaining turns by swinging with Tivit turn after turn until you win via commander damage since itll only take three hits to seal the deal
This is a personal preference for ratios of certain cards and a well spread mana curve built into a cube however if you are building a cube based more on power level alone it is hard to cut Swords, even this one