lightning storm yugioh card (UR) - RA01-EN061 - Ultra Rare Destroy all Attack Position monsters your opponent controls Yugioh Lightning Storm IGAS-EN067 1st

This will almost exclusively relate to the ability to play particular decks in tournaments

X-spells like Green Sun's Zenith or Finale of Devastation are particularly powerful in mono-green decks

Sliver Swarm - Commander Masters Sliver Swarm, as the name suggests, is a deck thats all about Slivers , a creature type thats relatively minor on its own but buffs every other ally with the same type

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Volo would note that Monster Manual is not a creature card

Out of all the precons in NCC, this one felt like the slowest, which is likely also why they let it get away with a little more value in the creature department