Dune-Brood Nephilim does not have summoning sickness.
An opponent is unable to block
Hellkite Charger and
Dune-Brood Nephilim.
You control at least eight lands.
Steps
Declare
Dune-Brood Nephilim 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 you control and to get an additional combat phase after this one.
Deal combat damage with
Dune-Brood Nephilim.
Dune-Brood Nephilim triggers, creating a 1/1 Sand creature token for each land you control.
Thermopod seven times by sacrificing seven Sand creature tokens, 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 you control and to get an additional combat phase after this one.