Heroic Dice! [House Rule]

Heroic Dice in action!

HEROIC DICE

Heroic dice are extra dice you may use in place of poor or undesirable dice rolls. They represent a well of inner resolve, an unrelenting drive, a will to succeed, or simply sheer blind luck that distinguishes adventurers from everyone else.

When you make a bad roll, you may declare to the referee you are spending a Heroic Die to re-roll a single die. A Heroic Die may be any die type and may be spent in any situation—attack roll, damage roll, saving throw, proficiency (or skill) check, and so forth.

You may only spend one Heroic Die on any single bad die roll—you cannot keep spending Heroic Dice to re-roll until you get a favorable result. If a Heroic Die roll is equal to or worse than your original roll, use the original roll. However, that Heroic Die is still spent.

You gain more Heroic Dice to spend as you gain levels. Heroic Dice refresh at the start of each day.

HEROIC DICE TABLE

Character Level	Heroic Dice per Day
1-3	1
4-7	2
8-12	3
13+	4

This is a pretty straightforward house rule I've encountered in many variations over the years. Some referees divvy them up into specific pools for spellcasting or combat, and others call them luck dice, drama dice, fate points and such.