lotr booster box TCG: Mount Doom $238 Produced in English Collector boosters may include serialized Solar Rings The Lord of the Rings:

You may cast creature cards exiled with Lukka's first ability as noncreature spells if a rule or effect allows you to do so

9 Portal Manipulator Send Your Attacks Elsewhere, Please Very few cards redirect attacks, which makes sense given that doing so doesn't do anything in heads-up games, so there's no reason to print an effect like that in a Standard-release set

Even if your opponents are able to get rid of Flynn in a single challenge, its still going to cost them a card - and if they hesitate, you might be gaining two lore each turn

Animar, Soul of Elements acts as a backup commander for the deck

Alolan Persian [Holo] #79 Pokemon Sun & Moon Keep track of your collection value over time

The above MTG cards are estimated to be the most valuable overall, but there are plenty of others worth at least a couple hundred dollarsenough to be worth covering, one way or another