hollow bay
Achieve this set of three achievements by killing four enemies with one katana swing (not hook or shuriken) while auto is off. Challenge kills do not count. First level is 10. 2nd level is 100. Final level is 1000.
This is (1) achievable, (2) requires some skill and/or effort on the part of the player and isn't entirely RNGd, (3) could eventually be done by anyone and (4) there's at least one random event that could help (the Samurai Frenzy).
crimson creek