1 Collector Sample Pack
Simply wipe clean with a damp cloth so your playmat stays in top shape even after intense tournaments
For Standard decks like mono-blue or mono-red, this often means playing a lot of cheap cards with immediate impact, since four one-mana spells add up to more impact than one four-mana spell
Paired with Ruby Medallion, it effectively gives extra copies of reducers, so its easier to chain rituals and finish with Past in Flames, Wish, Grapeshot, or Empty the Warrens
Maybe Force of Negation ends up shaping the format the most, maybe Flusterstorm ends up the most-played card, but speaking to raw power level, these lands are the best cards previewed so far
Sandwiching the gaming card tightly between a rigid (non flexible) material such as cardboard is also acceptable