Combat in Seed is exceptionally simplified.

If you are within range of striking or shooting a foe- you hit. The only exception to this rule is if you aren't proficient with, or have never used, the weapon with which you are attempting to wound them.

In this case the chances are 50/50. Roll on a D12 dice. 1-6 you miss completely, 7-9 you hit but you fumble and drop the weapon, 10-12 you hit.

You always cause -or- receive one wound on all attacks (depending on if you were the attacker or the attacked). The only exception to this are magical weapons or class moves that enable you to do extra damage.