An opponent cannot block and kill Goldspan Dragon and Hellkite Charger.
Steps
Declare Goldspan Dragon and Hellkite Charger as attackers.
Hellkite Charger, Goldspan Dragon, and Jolene triggers.
Resolve the Goldspan Dragon and Jolene triggers, creating four Treasure tokens.
Activate the Treasure tokens by tapping and sacrificing them, adding ({6} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Resolve the Hellkite Charger trigger from step 2, causing you to pay ({5} magic symbol) ({R} magic symbol) ({R} magic symbol) to untap all attacking creatures and to get an additional combat phase after this one.