My reasoning is that some X-spell payoffs like Zaxara, the Exemplary dont work with abilities
The theme for a cube deck will be substantially more vague and thus allow for many more kinds of cards to work in that archetype
If Torpor Orb and a creature enter the battlefield at the same time, that creature entering the battlefield won't cause triggered abilities to trigger
A Reckoning Approaches Like Perhaps You've Met My Cohort, A Reckoning Approaches allows you to cheat an incredibly expensive and impactful creature into play, but it can fail
You want to maximize your deck's potential, and that means playing only your very best cards
player is currently only available English, it is planned for other languages, and, using canned phrases, you will be able to communicate regardless of your opponent's native tongue