({2} magic symbol) ({R} magic symbol) ({G} magic symbol) plus commander tax if applicable available.
Steps
Play
Power Depot, which will enter with a +1/+1 counter on it due to its modular ability.
Cast
Toph either from your hand or from the command zone by paying ({2} magic symbol) ({R} magic symbol) ({G} magic symbol) plus commander tax if applicable.
When
Toph enters, it triggers, earthbending
Power Depot and putting a number of +1/+1 counters on
Power Depot equal to the mana spent to cast
Toph, increased by
Shang-Chi.
Activate
Ashnod's Altar by sacrificing
Power Depot.
When
Power Depot dies, its modular ability and
Toph trigger.
Resolve the modular trigger, putting the +1/+1 counters that were on
Power Depot onto
Crystalline Crawler, increased by
Shang-Chi.
Resolve the
Toph trigger, returning
Power Depot from your graveyard to the battlefield tapped.
Power Depot will enter with a +1/+1 counter on it due to its modular ability.
Activate
Ashnod's Altar by sacrificing
Toph. Choose to return
Toph from your graveyard to the command zone.
Activate
Crystalline Crawler by removing a +1/+1 counter from it, adding ({RG} magic symbol) .
Repeat step 9 until you have enough mana to cast
Toph.
Repeat from step 2.
Results
Infinite +1/+1 counters on creatures you control.
Infinite ETB.
Infinite LTB.
Infinite colored mana.
Infinite colorless mana.
Infinite death triggers.
Infinite landfall triggers.
Infinite sacrifice triggers.
Metadata
In 0 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).