Interminable rooms

Intro Class-A monsters: A-5 A-10 A-35 A-60 A-80 A-90 A-100 A-120 A-150 A-160 A-183 A-190 A-200 A-220 A-221 A-245 A-246 A-247 A-258 A-278 A-300 A-332 A-350 A-404 ULB-278 TLAB-278 M-120 Class-E monsters: E-1 E-22 E-42 E-60 E-92 E-100 E-142 E-144 E-150 E-200 E-230 E-250 E-300 E-387 Class-V monsters: V-5 V-27 V-35 V-50 V-60 Class-X monsters X-10 X-35 X-60 X-100 X-120 X-150 X-200 X-300 X-332 X-247 X-246 X-220 XE-1 XE-22 XE-200 XV-5 XV-35 XV-27 XV-50 XV-60 Extra monsters: A-250 A-400 A-600 A-500 A-700 A-750 A-800 A-900 A-1000 (you can be anyone you want)