Every card is essential because it demonstrates its power in combination, and it is a theme that tends to be highly evaluated for each card
However, its only the best landfall cards in Commander that turn that into a way to win the game
Nice plus even in 40 life formats like Commander
EX3-044 R Digimon Lv.6 Brakedramon Color Green Cost 12 DP 12000 Digivolve Cost 1 GreenBlue 4 from Lv.5 Form Mega Attribute Virus Type Machine Dragon Card Text 1 [Special Digivolution Condition] [Digivolve]3 from [Groundramon] or [Wingdramon] [Effect] [All Turns][Once Per Turn] When this Digimon becomes suspended, suspend 1 of your opponent's Digimon
According to responses from Mark Rosewater on his Blogatog Tumblr, he and the design team feel that you cant go half in, which to me, sounds like they believe you have to label everything
On platforms like eBay, a huge percentage of seller headaches come from buyers claiming a card wasn't in the condition described