When Crimson Biomes are spread by yourself they will indeed spawn mobs! just make sure they're a good width.
1 Answers · Games & Recreation · 10/07/2014
...world, also if you are using the PC version 1.2 adds the crimson biome it is the alternate version of the corruption so you might have to go there......
2 Answers · Games & Recreation · 23/10/2013
...of Lenses from Demon Eye enemies, you can visit the Crimson / Corruption and create 'Suspicious Looking Eye' (6 lenses each...
1 Answers · Games & Recreation · 28/07/2015
... - dropped by some enemies in Underground Crimson / Corruption Sight - defeat The Twins There's also: ...
2 Answers · Games & Recreation · 23/04/2016
.... Make sure the Crimson / Corruption hasn't spread too close to...sure there's a table, chair, and light source. If this... a walking terraria wiki.)
2 Answers · Games & Recreation · 17/11/2015
Try asking your question on Yahoo Answers