Lets say your opponent fires off a Lightning Bolt while controlling a card with a replacement effect that would affect said Bolts damage, like Solphim, Mayhem Dominus
The condition of the item may vary depending on the individual
This made it easy to shove three copies and a Toon monster into any deck and cut your 40-card deck down to a 36-card deck, heavily improving your ratios
Being able to get a red for ANY spell cast, means you can easily keep a storm going
Master Duel starter pack is the first major choice you make in the free-to-play card battler
Even if you're not bluffing countermagic you can put any land into play as a surprise - flash in a Maze of Ith when they attack you, play a Sejiri Steppe or Bojuka Bog as an instant, play Vesuva in response to them blowing up an important land, etc