Aretopolis
Plane -- Kephalai
When you planeswalk to ~this~ and at the beginning of your upkeep, put a scroll counter on ~this~, then you gain life equal to the number of scroll counters on it.
When ~this~ has ten or more scroll counters on it, planeswalk.
Whenever chaos ensues, put a scroll counter on ~this~, then draw cards equal to the number of scroll counters on it.
Grand Ossuary
Plane -- Ravnica
Whenever a creature dies, its controller distributes a number of +1/+1 counters equal to its power among any number of target creatures they control.
Whenever chaos ensues, each player exiles all creatures they control and creates X 1/1 green Saproling creature tokens, where X is the total power of the creatures they exiled this way. Then planeswalk.