Official Homebrew Rules

It Happened

If an action is declared by a character it is canon for the purposes of the story unless said player personally reacts their action prior to the completion of their turn.

Blood Dice of Akathar

Before the result of a die roll is announced, a player may request to use one of three D6 "Blood Dice" to add to your roll. However, upon requesting to use the blood dice, the DM gets a matching D6 to use at their discretion.

Desperation

If a player has gone two consecutive combat rounds without landing a hit, at the DM's discretion, their next attack round can be made with desperation, granting advantage on the first attack or ability check of their turn.

Critical Hit/Miss

• On a Critical Hit (20), Weapon damage is the maximum damage for that weapon. Dice ARE NOT doubled at this stage. Roll a d20 - if 11 or higher, you may roll an additional set of damage dice for your weapon.
• On a Critical Miss (1), roll a percentile dice. The higher the number, the worse the consequence of your failure. Anything higher than a 50 should be significant detriment to the party, but what happens is up to the Player. If the DM feels the result doesn't match the roll, the DM always has the right to override.