As Story Circle enters the battlefield, choose a color.
: The next time a source of your choice of the chosen color would deal damage to you this turn, prevent that damage.
Subterranean Hangar enters the battlefield tapped.
: Put a storage counter on Subterranean Hangar.
, Remove any number of storage counters from Subterranean Hangar: Add for each storage counter removed this way.
Exile all nontoken permanents. Starting with you, each player chooses one of the exiled cards and puts it onto the battlefield tapped under their control. Repeat this process until all cards exiled this way have been chosen.