Cast 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.