Activate Yawgmoth's second ability by paying and discarding a card, causing you to put two +1/+1 counters on Crystalline Crawler and Mindless Automaton.
Activate Crystalline Crawler's first ability twice by removing two +1/+1 counters from it, adding .
Activate Mindless Automaton's second ability by removing two +1/+1 counters from it, causing you to draw a card.