An opponent cannot block and kill Goldspan Dragon.
Steps
Declare Goldspan Dragon as an attacker.
Goldspan Dragon and Jolene trigger, creating four Treasure tokens.
Move to your postcombat main phase.
Activate three Treasure tokens by tapping and sacrificing them, adding ({4} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Activate Aggravated Assault by paying ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) , causing you to untap all creatures you control and to get an additional combat and main phase after this one.
Repeat.
Once you have infinite Treasure tokens, you may use them to activate Jolene's ability to put infinite +1/+1 counters on Jolene.