X is the total amount of life you gained this turn, regardless of any life lost
(If a creature with a finality counter on it would die, exile it instead.) Illustrated by Jason Rainville Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Legal Modern Not Legal Brawl Legal Legacy Legal Comp
While its true that at any given Commander table, there can be three other players who were integral in deciding your fate in the game, I think there are a lot of intangible elements along every step of a game that can be examined to help us consider why exactly we lost a game of Commander
One fun rules advantage is you can actually tap a Creature with summoning sickness to pay for Conspire, because it's the card with Conspire tapping the Creature, not attacking
Mystic Remora It's not (just) about card advantage
With some luck, you might even get your very own Lapras ex to add to your collection or build a deck with