Guardragon Agarpain Guardragon Agarpain is banned for the same reason as several link monsters: its generic, easy to summon, and has an absolutely insane effect
Using your characters to banish your opponents valuable cards helps both to slow them down and protect your own precious cards from counterattacks
This will help you find a buyer as quickly as possible
The best way to remember this is to note that every card in collector boosters has some form of premium treatment, either being foil, showcase, or extended border, whereas cards from The List show up as printed in their original set, albeit with a planeswalker symbol on the bottom left
The temporary mana you can get with both versions of Neheb and Mana Geyser can be a big help casting our more expensive planeswalkers ahead of curve
While the game has changed pretty drastically since the release, its constantly getting updates, new expansions, new game types, and new systems