Broodlord, choosing ({3} magic symbol) for X, but paying a total of ({G} magic symbol) due to
Animar.
Animar triggers, putting a +1/+1 counter on it.
Broodlord enters the battlefield, putting three +1/+1 counters on
Crystalline Crawler.
Activate
Crystalline Crawler's second ability three times by removing three +1/+1 counters from it, adding ({1} magic symbol) ({G} magic symbol) ({G} magic symbol) .
Activate
Temur Sabertooth by paying ({1} magic symbol) ({G} magic symbol) , returning
Broodlord from the battlefield to your hand.
Repeat.
You may choose larger numbers for X in future iterations to get infinite +1/+1 counters, colored mana, and card draw.
Results
Infinite card draw.
Infinite colored mana.
Infinite draw triggers.
Infinite ETB.
Infinite LTB.
Infinite storm count.
Infinite blinking.
Infinite +1/+1 counters on creatures you control.
Metadata
In 11 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).