Black knight very low chance

I didn't encountered him in 4 weeks grinding 14-16 maps, previously he appeared in T13 once.

That's about 800 maps just as well as my mappers didn't run into bandit for spam of 200 T14+ maps. How we supposed to complete achievement, one of which is also buggy due to boss's design - 2/3 of rocks maybe missing if he's not srictly in center - and damage scaling - e.g. rocks that block laser in high tier maps die in a fraction of second, leading to fact that verisium laser can be obtained only through exploiting logging\portal\temporal chains bug or carry help?

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EllAnteres wrote:

I didn't encountered him in 4 weeks grinding 14-16 maps, previously he appeared in T13 once.

That's about 800 maps just as well as my mappers didn't run into bandit for spam of 200 T14+ maps.

According to wiki: "It can randomly be encountered in tier 16+ maps"
Source: https://www.poewiki.net/wiki/Starfall_Crater
(They may have changed some things in earlier patches.)

Anecdotal evidence is also that he "often" appears in T16 maps.