Aretopolis, Light of Kephalai

At the beginning of your upkeep put a lustre
counter on Aretopolis, Light of Kephalai, then
you gain life equal to the number of lustre
counters on it.
When Aretopolis has ten or more lustre counters
on it, sacrifice it.
{5}, {t}: Put a lustre counter on Aretopolis, then
draw cards equal to half the number of lustre counters on it, rounded down.