Board Thread:Plants vs. Zombies Heroes/@comment-27053902-20170717235938/@comment-5294654-20170721071419

HEROSELECT_RANDOM_FIGHTS_INFO,These are random battles, off of the main Mission path.Here you can test decks, complete Quests, and earn Event Tickets without any special rules.

Doesn't seem like it's customizable. It sounds like it's just a normal AI battle in a normal setting.