They stay in your sideboard until you grab them with a learn effect, or another kind of card that could look for them outside the game
As the game has progressed through multiple expansions, rule clarifications, tournaments, and editions, a lot of new rules, cards, and special abilities have been introduced
"These cards have the holographic numbering [#5/82], but they are non-holographic," explained Pratte
Dimir Strandcatcher Surveil is an awesome mechanic for any graveyard synergies, and Dimir Strandcatcher comes down and lets you immediately benefit from its trigger so long as you have at least one creature that can attack
Whenever a creature with backup enters the battlefield, you put that number of +1/+1 counters on a target creature
There was a three book LOTR set published with amazing cover art by Barbara Remington that was a cult hit on US college campuses in the 1960s