Valduk has at least five Auras and/or Equipments attached to it.
Steps
At the beginning of your combat phase,
Valduk triggers, creating at least five 3/1 Elemental creature tokens with trample and haste.
Move to your postcombat main phase.
Activate
Thermopod's second ability five times by sacrificing five Elementals, adding ({R} magic symbol) ({R} magic symbol) ({R} 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 causing you to get an additional combat and main phase after this one.
Repeat.
If
Valduk has at least six Auras and/or Equipments attached to it, this combo nets infinite Elemental tokens and colored mana.
Results
Infinite combat phases.
Infinite creature tokens with haste.
Infinite death triggers.
Infinite ETB.
Infinite LTB.
Infinite red mana.
Infinite sacrifice triggers.
Infinite untap of creatures you control.
Infinite mana creatures you control can produce.
Metadata
In 67 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).