Cast Corpse Cur.
When Corpse Cur ETBs, Corpse Cur and Molten Echoes trigger.
Allow the Corpse Cur trigger to fizzle.
Activate Ashnod's Altar by sacrificing Corpse Cur, adding {C}{C}.
Resolve the Molten Echoes trigger, creating a token copy of Corpse Cur.
The token copy of Corpse Cur triggers on ETB, returning the original Corpse Cur to your hand.
Activate Ashnod's Altar by sacrificing the token copy of Corpse Cur, adding {C}{C} Repeat.

Infinite death triggers

Infinite ETB

Infinite LTB

Infinite sacrifice triggers

Infinite storm count

Corpse Cur

Molten Echoes

Ashnod's Altar

Cast Corpse Cur.
When Corpse Cur ETBs, Corpse Cur and Molten Echoes trigger.
Allow the Corpse Cur trigger to fizzle.
Activate Krark-Clan Ironworks by sacrificing Corpse Cur, adding {C}{C}.
Resolve the Molten Echoes trigger, creating a token copy of Corpse Cur.
The token copy of Corpse Cur triggers on ETB, returning the original Corpse Cur to your hand.
Activate Krark-Clan Ironworks by sacrificing the token copy of Corpse Cur, adding {C}{C} Repeat.

Combos with "Corpse Cur"