Question Underground blazer summoning trick?

[bl1tzx]

Ok, i've seen ppl summoning blazers into the cornors of walls so the blazers can hit virtually anywhere on the map... and how exactly do u do that???! i tried standing facing the coner, facing away from the coner... but neither works, since i have a lvl 22 white blazer, i think i got a good potential to kill ppl with it

please tell me how to summon the blazer in the corner of the underground place!