Stargirls' Cosmic Staff creates a wide range of abilities.
Focused energy to defy gravity, allowing the wielder and others flight.
It can attract or repel living beings or objects to/from itself.
Also used in conjunction with flight to protect against atmospheric damage in high velocity flight.
It can project yellow and red stellar energy blasts (these last particularly effective against kryptonians).
When always used to absorb stellar energy, it could sometimes absorb electricity to dissipate it.
Energy Construct Creation
Could melt steel.
Ability to attune itself to its current wielder; doing so makes it hard for the staff to become attuned to anyone else. It can receive mental commands from the wielder from certain distances.
Starman (Ted Knight) used this ability to receive "emergency calls" from his FBI friend, Woodley Allen; Allen opened a little radioactive capsule when he wished call Starman, and the hero could detect it from any part of the city.