execute store result score random itemcount run random value 1..4
execute if score random itemcount matches 1 if block ~7 ~ ~7 #survivalplus:respawnable run summon marker ~7 ~ ~7 {Tags:[special,shadow],CustomName:"Shadow"}
execute if score random itemcount matches 2 if block ~-7 ~ ~-7 #survivalplus:respawnable run summon marker ~-7 ~ ~-7 {Tags:[special,shadow],CustomName:"Shadow"}
execute if score random itemcount matches 3 if block ~7 ~ ~-7 #survivalplus:respawnable run summon marker ~7 ~ ~-7 {Tags:[special,shadow],CustomName:"???"}
execute if score random itemcount matches 4 if block ~-7 ~ ~7 #survivalplus:respawnable run summon marker ~-7 ~ ~7 {Tags:[special,shadow],CustomName:"Shadow"}