Aretopolis

When you planeswalk to Aretopolis and at the beginning of your upkeep, put a scroll counter on Aretopolis, then you gain life equal to the number of scroll counters on it.
When Aretopolis has ten or more scroll counters on it, planeswalk.
Whenever chaos ensues, put a scroll counter on Aretopolis, then draw cards equal to the number of scroll counters on it.

Planechase Anthology Planes

When you planeswalk to Aretopolis or at the beginning of your upkeep, put a scroll counter on Aretopolis, then you gain life equal to the number of scroll counters on it.
When Aretopolis has ten or more scroll counters on it, planeswalk.
Whenever you roll {Chaos}, put a scroll counter on Aretopolis, then draw cards equal to the number of scroll counters on it.

Planechase 2012 Planes

When you planeswalk to Aretopolis or at the beginning of your upkeep, put a scroll counter on Aretopolis, then you gain life equal to the number of scroll counters on it.
When Aretopolis has ten or more scroll counters on it, planeswalk.
Whenever you roll chaos, put a scroll counter on Aretopolis, then draw cards equal to the number of scroll counters on it.

For both abilities that count the number of scroll counters on Aretopolis, count all scroll counters on it, not just ones you put there.