You control lands that can produce at least ({5} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Opponents cannot block
Hellkite Charger.
Steps
Declare
Hellkite Charger as an attacker.
Hellkite Charger triggers.
In response, activate lands you control by tapping them, adding at least ({5} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Resolve
Hellkite Charger's trigger, paying ({5} magic symbol) ({R} magic symbol) ({R} magic symbol) to gain an extra combat phase and untap all attacking creatures you control.
When
Hellkite Charger deals combat damage,
Sword of Feast and Famine triggers, untapping all lands you control and causing the defending player to discard a card.