@c5bffeca My two favorites:

-Infinity’s face-to-face roll - flawless way of handling contested roll.  I have a target #, you have a target #, we both roll and whoever got the highest roll without going over that target wins the roll.

- Bolt Actions’s activation mechanic - we have a bag and put a token (or die) for each player for each unit they have. Blind draw, whoever gets a token activates a unit. 

 @c5bffeca I love the KillTeam Combat Mechanism. Both roll all your attack dice, then starting with the attacker declare a dice at a time an attack or a parry. Just find it a really satisfying mechanic. 

….but… I think my favourite is the d66 injury table in Mordheim. Just love the variety of misery you can inflict on yourself. Causes all sorts of swing in your narrative- the classic archer who loses an arm and can’t fire a bow anymore.