Dune-Brood Nephilim does not have summoning sickness.
An opponent is unable to block Dune-Brood Nephilim.
You control at least six lands.
Steps
Deal combat damage with Dune-Brood Nephilim.
Dune-Brood Nephilim triggers, creating a 1/1 Sand creature token for each land you control.
Proceed to your postcombat main phase.
Activate Thermopod's second ability by sacrificing five Sand tokens, adding ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Activate Aggravated Assault by paying ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) , untapping all creatures you control and getting an additional combat phase and main phase after this phase.