Grand Warlord Radha and Hellkite Charger on the battlefield.
You control at least six other creatures that can attack this turn.
An opponent is unable to block and kill your creatures.
Steps
Declare Radha, Hellkite Charger and at least six other creatures as attackers.
Radha and Hellkite Charger trigger.
Resolve the Radha trigger, adding at least ({6} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Resolve the Hellkite Charger trigger, choosing 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.