[quote=@Seraphicide]Renji Kurogama - Abyssal Onyx Mirror, how long does it take to crystallize an acre of land? Like how long does an opponent have to dodge this? Also specify that casting time in seconds or # of posts. 
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Well, considering the size of the Jutsu and the advantage Renji gains once it's cast, It should probably take at least 2 posts minimum to cast. Unless you feel differently, in which case I'm happy to go longer. 

In regards to dodging, the main things to dodge would be the spikes/fissures, though they aren't instantaneous attacks. If anything they're supposed to be used to catch an opponent off-guard in order to setup for another attack or jutsu. Therefore most, if not all, Chuunin-level ninja & above should be able to dodge them quite simply under completely normal circumstances. It's possible for an opponent to escape the crystallized area using whichever mobility/flight jutsu they prefer or by simply climbing any structure or tree that might populate the area.

Apologies for the delayed response.