Thats eight mana minimum, ten with kicker if you want it to have any real impact on the game
Temur Mechanic: Harmonize - Harmonize here is a flashback variant, so players can cast it from their graveyard
Any one-shot effects that are waiting "until [this] leaves the battlefield," such as that of Banishing Light, won't happen when a permanent phases out
Add Opposition to complete the package
This creates a small space to explore what I call gimmick decks in the Alpha League, a design space generally that does not exist anywhere else in constructed Magic (although, on occasions, can occur in Limited contexts, which obey the original rules of Magic: 40 card minimums, and no unique card caps)
Even when disconnected from its wider story though, the flavour text here does a wonderful job at selling the huge investment that players must put in, not only in building this marvellous structure, but also in activating it