The Endlessness

Guides

Rules Reference

D&D 5e rules explanations and mechanical deep-dives

rules18 min read

D&D 5e Combat Rules Explained Simply

A beginner-friendly guide to D&D 5e combat. Initiative, turn order, actions, bonus actions, conditions, death saves, and more. No experience required.

rules2 min read

D&D 5e Ranges: Normal vs. Long Range Explained

D&D 5e weapon and spell range rules. Normal range, long range, disadvantage, and tactical range considerations.

rules2 min read

Proficiency Bonus in D&D 5e: How It Scales

D&D 5e proficiency bonus. How it scales from +2 to +6, what it applies to, and why it makes high-level characters competent everywhere.

rules2 min read

Skill Checks in D&D 5e: Complete Guide

D&D 5e skill checks explained. DC, proficiency, expertise, Passive checks, and when to use each skill.

rules24 min read

D&D 5e Spell List: All 340+ SRD Spells

Complete D&D 5e SRD spell list organized by level, with school, casting time, and concentration info. Your go-to spell reference.

rules3 min read

Falling Damage in D&D 5e: How It Actually Works

D&D 5e falling damage rules. The 1d6 per 10 feet formula, the 20d6 cap, Feather Fall, and why gravity is the game's most reliable trap.

rules2 min read

D20 Probability: Understanding D&D Odds

D&D 5e d20 probability. What you roll on average, odds of crits, advantage math, and save success probabilities.

rules5 min read

Movement in D&D 5e: Speed, Difficult Terrain, Climbing, and Swimming

D&D 5e movement rules explained. Speed, difficult terrain, climbing, swimming, jumping, falling, and how the Dash action actually works.

rules3 min read

Prepared vs. Known Spells: The D&D Casting Systems

D&D 5e prepared vs. known spells explained. Which classes use which system, the trade-offs, and why preparation beats knowing for most situations.

rules14 min read

D&D 5e Initiative and Turn Order Explained

A complete guide to D&D 5e initiative, turn order, surprise rounds, and action economy. Everything you need to run combat smoothly.

rules2 min read

Wisdom vs. Intelligence Saves: Which Protects You More

Wisdom vs. Intelligence saving throws in 5e. Which is called more often, why Wisdom matters more, and how to improve both.

rules5 min read

Cover, Line of Sight, and Vision in D&D 5e

The full rules for cover, line of sight, lightly obscured vs heavily obscured, darkness, and how vision rules interact with attacks and spells in 5e.

rules9 min read

D&D 5e Death Saves: Rules and Strategy

Everything you need to know about D&D 5e death saving throws, stabilization, healing at 0 HP, and instant death. Clear rules plus tactical advice.

rules3 min read

Exhaustion in D&D 5e: The Most Dangerous Condition

D&D 5e exhaustion rules. Six levels of penalties, sources, removal, and why exhaustion is the most-feared condition in long adventures.

rules12 min read

D&D 5e Concentration: The Complete Guide

Master D&D 5e concentration rules. Learn what triggers checks, the DC formula, what breaks concentration, and which spells are worth concentrating on.

rules5 min read

Ritual Casting in D&D 5e: The Free Magic Guide

Ritual casting explained: which classes have it, the best ritual spells, and why ritual casters never actually run out of utility magic.

rules16 min read

D&D 5e Action Economy: Master Your Turn

Complete guide to D&D 5e action economy. Understand actions, bonus actions, reactions, movement, and free interactions to dominate every combat turn.

rules5 min read

Spell Slots in D&D 5e: Complete Guide

How D&D 5e spell slots work: casting at higher levels, slot recovery, upcasting, and the difference between full, half, and pact casters.

rules3 min read

D&D 5e Dragons: Complete Guide to Chromatic and Metallic

D&D 5e dragons explained. Chromatic vs metallic, breath weapons, legendary actions, and how to fight dragons at every level.

rules10 min read

What Is the D&D SRD? Free Rules Explained

The D&D 5e SRD gives you free access to core rules, classes, spells, and monsters. Learn what's included, what's not, and how to use it.

rules5 min read

Short Rest vs. Long Rest in D&D 5e

Short rest vs. long rest in D&D 5e: what each recovers, timing, interruptions, and why some classes love short rests more than others.

rules2 min read

Critical Hits in D&D 5e: How They Work

D&D 5e critical hits. Double dice, when crits happen, expanding crit range with Champion, and why crits matter.

rules5 min read

Hit Points and Hit Dice in D&D 5e: Complete Guide

How HP and Hit Dice work in 5e: starting HP, HP per level, hit dice recovery on short rests, and why Constitution matters for every class.

rules5 min read

Armor Class in D&D 5e: How AC Actually Works

Armor Class in D&D 5e: how it's calculated, the armor types, Unarmored Defense, Shield bonuses, and why 20 AC matters at every level.

rules3 min read

D&D 5e Encounter Difficulty: CR and Balance Explained

D&D 5e CR (Challenge Rating) and encounter balance. How to calculate encounter difficulty, adventuring day budget, and solo play adjustments.

rules3 min read

Understanding D&D 5e Monster Design

How D&D 5e monsters are designed. CR, stat blocks, traits, and what makes a fight challenging.

rules5 min read

Saving Throws in D&D 5e: Complete Guide

How saving throws work in D&D 5e. The six save types, proficiency by class, when you roll, and why Strength saves are the rarest of them all.

rules6 min read

All 15 Conditions in D&D 5e Explained

Every D&D 5e condition explained: Blinded, Charmed, Frightened, Paralyzed, Stunned, and the rest. What they do, how to remove them, and which are deadly.

rules6 min read

Grappling and Shoving in 5e: The Complete Rules Guide

D&D 5e grappling and shoving rules. How to grapple, when to shove, how to escape, and which classes dominate grappler builds.

rules5 min read

Opportunity Attacks in D&D 5e: Everything You Need to Know

Opportunity attacks explained: when they trigger, how to avoid them, Disengage vs Dash, and class features that weaponize opportunity attacks.

rules5 min read

Advantage and Disadvantage in 5e: The Complete Rules Guide

A plain-English guide to advantage and disadvantage in D&D 5e. When you get them, how they stack, and why they're the most elegant rule in the game.

rules3 min read

Which D&D Saving Throw Proficiency Matters Most

D&D 5e saving throw proficiency priority. Constitution > Wisdom > Dexterity > others. The math behind save importance.

rules3 min read

D&D Myths Debunked

Common D&D 5e misconceptions debunked. Flanking, meta-gaming, rule quirks, and what's actually RAW.