A specific variant added in version 3.32/3.33 to handle hero selection more efficiently.
Survival is the priority here. In solo play, head to the opposite corner to avoid unnecessary damage. Successful completion grants 50,000 gold, which should be immediately invested using -bt .
Once you reach the "all hero images" event, your stats are quadrupled. This is the optimal time to use the -bt command while inside the event area to maximize your hero's power spike.