Thopter Squadron with three or more +1/+1 counters on it ).
Mana Needed
({2} magic symbol) available.
Steps
Activate
Thopter Squadron's first ability twice by paying ({2} magic symbol) and removing two +1/+1 counters from it, creating two 1/1 Thopter artifact creature tokens.
Activate
Ashnod's Altar by sacrificing a Thopter, adding ({C} magic symbol) ({C} magic symbol) ,.
Crime Novelist triggers, causing you to add ({R} magic symbol) and put a +1/+1 counter on it.
Activate
Thopter Squadron's second ability by paying ({1} magic symbol) and sacrificing the other Thopter token.
Ashnod and
Crime Novelist trigger.
Resolve the
Crime Novelist trigger, adding ({R} magic symbol) and putting a +1/+1 counter on it.
Resolve the
Ashnod trigger, copying
Thopter Squadron's ability.
Resolve both
Thopter Squadron abilities, putting two +1/+1 counters on it,.
Repeat.
Results
Infinite artifact ETB.
Infinite artifact LTB.
Infinite artifact sacrifice triggers.
Infinite creature LTB.
Infinite creature ETB.
Infinite creature sacrifice triggers.
Infinite death triggers.
Infinite colorless mana.
Infinite red mana.
Infinite +1/+1 counters on a creature.
Metadata
In 8 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).