I also skip over Gruul lands like Contested Cliffs and mana rocks like Gruul Signet and Talisman of Impulse
However, effects that stop a creature from untapping "during your untap step" or "during its controller's untap step" won't stop that creature from untapping during another player's untap step, and as such, Prop Room's ability will cause that creature to untap
GOLDSPAN DRAGON Having played with this card, I can attest that two mana is better than one from treasures
2010 Pokmon
Often, thats all you need to hold off an effective board wipe to win the game
But before you start pulling your house apart to find your old collection, there were a few key conditions to the complete set that gave it so much value, the main being they were in perfect condition, which yours wont be if theyve been piled together with rubber bands in a shoebox all this time