mtg timey wimey commander deck Magic Doctor Who facing alien threats Doctor Who MTG Commander Deck:

Prerelease players receive a collectible d10 spindown crystal counter for each event they attend (available while supplies last)

Anything that is looking for the "natural result" is looking for the number shown on the face of the die before these modifications

So yeah if you want to open packs of this set, and you probably do, make sure you buy a sealed box and that you do it before the end of the first distribution wave

Plus, it has a nifty additional effect that the controller of the spell it counters can't cast anymore spells this turn

They often see play in decks that are trying to fill their graveyards and play multiple spells per turn