Declare Bladewing and Hellkite Charger as attackers.
Hellkite Charger triggers, 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.
Deal combat damage to an opponent using Bladewing.
Bladewing triggers, creating at least eight 2/2 Zombie Knight creature tokens.
Move to your next combat phase.
Declare Bladewing and Hellkite Charger as attackers.
Hellkite Charger triggers, holding priority, activate Thermopod seven times by sacrificing seven Zombie Knights, adding seven ({R} 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.