True_Neutral's Test Chamber

Characters. There are 4 characters per team. Your party could be you and your 3 NPC teammates, or your 5 friends and 3 NPC teammates for 2 teams, et cetera. They all use the same layout of character sheet.

Attributes. Each character sheet has 4 attributes: leadership, knowledge, agility, and power. Assign +3, +1, 0, and -1 to each attribute. Each member of a 4-person team will have a different 0 attribute. The character with the highest starting leadership is the leader unless you want to have conflict about it. Faunus can add +1 to one appropriate attribute.

Rolls. Roll your six-sided die and add your modifier to take actions. Roll leadership to convince, lie, or perform. Roll knowledge to notice, inspect, or recall. Roll agility to maneuver, hide, or manipulate. Roll power to force, restrain, or resist. 3 is average, 6 is challenging, 9 and above is unlikely.

Semblance. Each character has either 12 or 4d6 Aura points (AP) plus their leadership modifier. These can be spent to use their Semblance. Design a Semblance around 2 abilities that each cost an action to use, one that has a weaker effect and uses 3 AP, and one that has a stronger effect and uses 6 AP. These abilities can absorb damage, disarm opponents, gain extra attacks, reduce opponents' defenses, increase maneuverability, et cetera. These abilities cannot be stacked within one action.

Weapon. Each character has a weapon with two modes, one melee and one with a range of up to 120 feet/40 meters. One mode rolls 1d6 + your highest attribute to hit a target and deal 1d6 damage, while the other rolls 1d6 + your second highest attribute and deals 2d6 damage.

Dust. Characters can carry 6 cartridges of Dust in their weapon and 8 cartridges of Dust on their person. Each cartridge can be used once, and it costs an action to load more Dust cartridges from your person into your weapon. There are 6 kinds of Dust: fire (2d6 extra damage), ice (creates a barrier 30 feet/10 meters long and 10 feet/3 meters high), wind (pushes entities 30 feet/10 meters away unless they roll 6+ power), electricity (stuns an opponent from taking action for the next round unless they roll 6+ agility), gravity (immobilizes a target for the next round), and hard light (creates a platform no larger that 1x1 meter for the next round). A character can carry any combination of these kinds of Dust, and can spend as many as they want whenever they take an action, but will have to purchase or scavenge for more.

Combat. The order in which teams take actions in a round is decided by the team leaders rolling leadership in descending order. Within each team, each character has 2 actions, which can be taken in any order. Each character can also move 30 feet/10meters + 5 feet x their agility, and can spend AP to move an additional 5 feet per point. Similarly, each character can leap 5 feet + 1 foot x their power, and can spend AP to extend their leap by 1 foot per point.

Attacks. Attacks cost an action. It also costs an action for a weapon to transform between modes. Attacks must roll to meet an entity's ability to dodge, which is 5 + their agility. If multiple characters choose to use an action to do a combo attack at the same time, they all roll attacks and take the highest number for all of them to hit and do damage. When characters take damage, it reduces their AP. They can be healed by using an action to roll leadership to replenish an equivalent number of AP, until they are reduced to 0 AP and their Aura breaks. After this, any hit will incapacitate them such that they cannot move or take actions. They will die after 3 rounds unless another character uses an action to roll knowledge greater than or equal to 6 to stabilize them. It takes a night's rest to recover all AP.

Leveling up. Whenever characters pass a milestone, their maximum AP increases by 3 or 1d6 + their leadership, and they gain 3 points to distribute amongst their attributes to a maximum of +6. Semblance and weapon improvement must occur organically in-game. There is no theoretical maximum level.

Game mastering. Run NPCs as though they are player characters of equal attributes but lower AP. Run Grimm as though they have the number of unique attacks to do an equivalent number of d6 per the party's AP in 3 rounds (e.g. 16d6 in 3 rounds for a level 1 team of 4).