Discard fares a little better, but only if you can play so much of it that it does start to leave the opponent without good plays on their turn
While cards from the main set are much less exciting compared to other Collector Booster boxes on this list, Agathas Soul Cauldron, Beseech the Mirror, and Moonshaker Cavalry all have admirable secondary market prices
8 Mountain
This makes it mechanically beneficial for you to recreate the moment where he kills Aerith
There is no shortage of token generators available, such as Scute Swarm, Beledros Witherbloom, and Tireless Provisioner, that let you easily flood the battlefield with them
Functionally, youre either exhausting summoned characters to quest and acquire lore, or to challenge and banish other characters (thus slowing down your opponent from questing)