Mobilize the Starforce

Cumulative upkeep {1} (At the beginning of your
upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Whenever you pay Mobilize the Starforce's cumulative upkeep, you may search your library
for a Kree creature card with converted mana
cost equal to the number of age counters on
Mobilize the Starforce and put it onto the battlefield. If you do, shuffle your library.