In DC20, the rule for Great Success and Great Failure (by 5’s) applies. This means that the results of situations are amplified when the resulting value of the dice roll is 5, 10, 15, 20, … higher or lower than the required Difficulty Class (DC). Lower values thus add additional complications and higher values add additional rewards.
/ Lower HP, Death's Door, important Tanking and Healing
In DC20, there is no need to roll dice for Damage. Damage is calculated from Hit rolls. The higher the Hit value, the more Damage. Hit and Damage values are reduced by an average to one third in DC20 compared to other systems. The Death’s Door mechanic allows characters to continue to be part of the fight even with zero and negative Hit Points, while allowing them to significantly increase the importance of Tanking, Exhaustion, Healing, and Rest.
/ Action Points, its Replenishment at the end of the turn, Advantages, more Reactions, Mana and Stamina
DC20 instead of Movement, Action, Reaction and Bonus Action, uses a system of four Action Points, which are Replenished at the end of the turn. These Action Points correspond to 12s and can be fully used for Movement, Attacks, Casting Spells and other Actions. Among other things, to gain one or more Advantages for rolling dice. Action Points can be used in advance for Reactions outside of your turn. Spellcasters have Mana Points instead of Spell Slots. And Martials have Stamina Points, which they can use for various Combat Techniques or even Actions. Depending on the current situation, it is possible to combine Action Points, Mana or Stamina into the most effective and tactical moves.
/ Spell duel instead of basic Counterspells, Combo Spellcasting and Spell Enhancement
At DC20, Spell Duel is used instead of the usual Counterspell. It is a dynamic Reaction for spellcasters in which the rolls of the spells cast are compared and the stronger spell overcomes the weaker one. However, if the rolls are equal, a Wild Magic Surge occurs and both casters then roll for a random effect from the Wild Magic Table. Spellcasters can also achieve greater magical effects by Combo Spellcasting for two or more spellcasters. In addition, each spell can be modified as needed with Spell Enhancement.
/ Attributes, Ancestries, Weapons, Armor, Multiclass, Maneuvers and other modifications
DC20 is a highly modifiable system suitable for all kinds of Homebrew. By reducing the number of Attributes to 4 (Strength, Dexterity, Charisma, Intelligence) and adding one Primary Attribute, it is possible to create unusual, yet fully capable combinations in DC20 (such as Charismatic Barbarian, Intelligent Champion, Agile Druid, Strong Wizard, etc.). Other examples of modifiable systems include Ancestries, where players can choose a character from combinations of parents, their own combinations of Weapons and Armor, offensive, defensive, or grappling Maneuvers, various combinations of Multiclass characters, and much more. Exactly according to their own needs for a Campaign, or for example a Duel (One-Shot).