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)

It is hard to know how important it is to keep your land count up compared to the spell you are considering countering

Anya, Merciless Angel With Anya, Merciless Angel, you need to aggressively get an opponent to 20 life or less

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