1,000 owls. one mechanic: the vigil.

roost an owl and its watch timer starts. the longer it stays unbroken, the higher its reward multiplier climbs - 1x at the start, up to 5x at 30 days. withdraw and the clock resets to zero. no lockup, nothing traps you - the only cost of leaving is leaving.

why it matters if you're buying a roosted owl can't be sold directly - it has to be withdrawn first, which pays out its rewards and resets the multiplier to zero. an owl that's been watching for 10 days is worth more held than sold. check how long an owl has been roosted before you buy - you're not just buying the art, you're buying (or not buying) its streak.