An old to-go box or Tupperware container will do fine
Since Ulalek uses the stack, you want instants and cards with flash
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Flavor Text Set Number 123 Language Legal Formats Commander, Legacy, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Modern, Pauper, Pioneer, Standard, Timeless Rulings (6/6/2025) Once a creature that has reach because of Sphere Grid's last ability has blocked a creature, removing all +1/+1 counters from that creature or causing Sphere Grid to leave the battlefield won't cause that creature to stop blocking.
While the card is mainly for the control matchup, the -2 ability is particularly intriguing to me in its ability to allow Knight of the Reliquary to find a hatebear to protect it as wellbe it Gaddock Teeg , Sylvan Safekeeper , or even just a plain Standard Bearer