Being an artifact, always replacing itself, having evasion, and trading up in combat are all great things for a card to do in Cube without being overwhelming
However, if Tenth District Hero is a 5/5 legendary Human Detective named Mileva, the Stalwart with vigilance and "Other creatures you control have indestructible" and you activate its first ability again, it will become a 4/4 legendary Human Detective named Mileva, the Stalwart with the same abilities, plus an additional (and almost certainly redundant) instance of vigilance
On top of that, Lurrus makes all your other cards better by being able to return them from the graveyard every turn
As much as I appreciate the white design space of rewarding you whenever your opponents do things, this feels pretty extreme
Its certainly really tricky when you have an idea, and then realize, Well actually, combined with this one card from 20 years ago, I might accidentally be creating a two-card infinite combo, Bowen says
The most expensive reprint as of now is Hallowed Spiritkeeper at almost $3