Aid or Interfere

When you help or hinder someone, roll+bond with them. ✴On a 10+, they take +1 or -2 to their roll, your choice. ✴On a 7–9, they still get a modifier, but you also expose yourself to danger, retribution, or cost. Any time you feel like two players should be rolling against each other, the defender should be interfering with the attacker. This doesn’t always mean sabotaging them. It can mean anything from arguing against a parley to just being a shifty person who’s hard to discern. It’s about getting in the way of another players’ success.

Always ask the person aiding or interfering how they are doing it. As long as they can answer that, they trigger the move. Sometimes, as the GM, you’ll have to ask if interference is happening. Your players might not always notice they’re interfering with each other.

Aid is a little more obvious. If a player can explain how they’re helping with a move and it makes sense, let them roll to aid.

No matter how many people aid or interfere with a given roll, the target only gets the +1 or -2 once. Even if a whole party of adventurers aid in attacking an ogre, the one who makes the final attack only gets +1.

Examples
GM: Ozruk, you stand alone and bloodied before a pack of angry hellhounds. Behind you cowers the Prince of Lescia, weeping in terror.

Ozruk: I stand firm and lift my shield. Despite certain doom, I will do my duty and defend the princeling.

Aronwe: I emerge from the shadows and draw my sword! “Doom is not so certain, dwarf!” I stand beside him. I want to help him defend. “Though I do not know you well, I have seen you in battle, Ozruk. If we are to die today, we die as brothers!” I don’t have any bonds with him but I want to try anyway.

GM: Touching, really. Okay, roll+0 and if you succeed, Ozruk, take +1 to your defend attempt. Here we go!