just note that a large (six inches and over) pea****
could very well smash glass. you could get away with thick glass though (at least 1/3 inch).
Since you want a smasher, set up the tank appropriately before introduction. Never add a mantis to a tank that hasn't cycled.
If you don't like pvc, then no problem. add LR (very roughly 1 lb per gallon). sand bed of 2-3 inches. rubble (pea sized rocks). keep lighting low.