Minecraft/Cactus

Prickly, green plants that thrive in extreme heat.

Obtaining
Cacti are found in deserts and badlands.

Use
Cacti have value in simple traps. Placing a wall of them damage mobs that approach. Careful though, those spikes will hurt you and your pets as well.

They also destroy any item thrown onto it. Even diamonds!

Cacti need support, similar to sand, but instead of falling, they break, like sugar cane and bamboo.