Since the effect for your opponent is not a requirement to play the card, there are times when you will get to play a character even if your opponent has nothing in their hand to send out
Return it to the battlefield under its owners control tapped and attacking at the beginning of that players next declare attackers step
This Beast truly is relentless
For that reason, I wouldnt be surprised if Sphere Grid dropped a bit in price once the novelty wears off, but it will likely always have a decent secondary market value because of the high likelihood for it to be synergistic with future Commander releases
Once one of these nodes is unlocked, it unlocks in every other characters Sphere Grid as well , and converts into an empty node
To avoid this issue, please order items with different release dates, separately