My answers change depending on whether Im considering the story of the card, the art, specific eras, language-specific releases, etc
Items listed here are in active development, with dedicated developer resources and task lists to complete
We should see this epic chase continue to fair well on the secondary card market for some time, and could potentially be worth as much as the Lucario some day
You could have Idris become a Mana Crypt or an Arcane Signet to ramp to your wincon
The community also accepts reverse holo bulk as trade credit, which can work well if you have duplicates
Liege also generates extra mana for you on your opponents' turns when you have a bunch of mana creaturesmana creatures in play, meaning you can keep up counterspells or other disruption