yu gi oh otk deck Exchange of the Spirit | Yu-Gi-Oh! Wiki Trickstars OTK Decks in Yu-Gi-Oh!

You basically cant attack into it, for risk of flipping your opponent into whats likely to be their best card, though you cant always stop them from feeding the Rector to a sacrifice outlet

Investment perspective: With their extreme rarity and status as the first Mega Hyper Rares in history, these cards could become highly sought-after collectible pieces in the long term

Mishras Factory was a great addition to any deck of any type and Black and/or Red Land destruction sorely missed Strip Mine

For a deck product, this has become a surprisingly expensive card

The other is less a mechanic and more of a new deck-building concept