Hellkite Charger | Savage Ventmaw | Druids' Repository

Cards

Declare
Hellkite Charger and
Savage Ventmaw as attackers.
Druids' Repository's first ability triggers twice, and
Savage Ventmaw and
Hellkite Charger trigger once.
Resolve the
Savage Ventmaw trigger, adding ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) .
Resolve both Druid's Repository triggers, putting two charge counters on it.
Activate Druid's Repository by removing a charge counter from it, adding ({1} magic symbol) .
Resolve the
Hellkite Charger trigger, 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.
Repeat each combat phase.