I found the devil walker(the spider tank thingy) and killed him alone. Yes it was hard and also died way too many times. Wasn't even worth it because I didn't get awarded. Btw it's really far back
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have you seen the public event that involves a devil walker yet? its harder because its has a time limit of i think 5 minuets (could be wrong on that) was only able to kill it once with help from 3 other guardians.