Once played, these cards remain in play until you or an opponent do something to remove it
Well, Im not a fan of the MV and stats
Once Rust-Shield Rampager has been blocked, reducing the power of a blocking creature to 2 or less won't remove that creature from combat or cause Rust-Shield Rampager to become unblocked
36 lands worries me, but with Hakbal in the command zone it's probably enough assuming we can explore a couple times
Its got high synergies with spacecraft, so you can fetch one and help station it
While a 5/5 indestructible beater sounds like a reasonable threat at first glance, considering that Historic will likely heavily feature Teferi, Hero of Dominaria, Teferi, Time Raveler, and Oko, Thief of Crownsall of which incidentally answer a 5/5 indestructible Darksteel ReactorI'm not sure the plan will actually be competitive