Brooch of Tiny Mansions

At the beginning of your end step, if Brooch of
Tiny Mansions has fewer than four charge
counters on it, put a charge counter on it.
Remove four charge counters from Brooch of
Tiny Mansions: Until your next turn, your life
total can't change and you have protection from
everything. All permanents you control phase out.
Activate this ability only during your end step.