I like these sorts of items that you can banish for two different effects, depending on which characters you have in play
Building colorless decks in Commander allows for powerful options with unique abilities
In the latter case, since the door becoming unlocked is what causes the ability to trigger, effects that cause abilities that trigger when a permanent enters to trigger an additional time (such as that of Panharmonicon) won't apply
Graded Population Report: Kuja, Genome Sorcerer #232 Visualize the distrbution of grades in the chart
1998: Tolarian Academy from Urza's Saga The year 1998 was one of the most broken times in Magic 's history, an era known as Combo Winter where games were regularly ending on Turn 1
Final note, Im intentionally ignoring cards from the following categories: Alchemy (they tend to be broken and require their own separate list) Silver-Border/Acorn-Stamped Constructed-only all-stars (Chalice of the Void, for example) Transformers Universes Beyond cards (didnt feel like reading those) #100