26

This is explained under "Limited Usage" on page 11 of the Monster Manual or here in the basic rules on D&D Beyond: Recharge X–Y. [...] At the start of each of the monster's turns, roll a d6. If the roll is one of the numbers in the recharge notation, the monster regains the use of the special ability. The ability also recharges when the monster ...


23

Dragons have a special gland which generates the breath weapon According to the D&D 3rd edition sourcebook Draconomicon (2003), chapter 1, a true dragon's breath weapon is produced by an organ in the chest known as the draconis fundamentum. The draconis fundamentum (7) is a gland possessed only by true dragons. Attached to the heart, it is the ...


18

No, an anti-magic zone would not affect dragon's breath The dragon is a magical creature, but the dragon's breath weapon is not listed as a magical effect. Therefore, an anti-magic zone would not affect it nor nullify it. Source: WoTC, Sage Advice Compendium, v 2.3 (2019), p. 17-18. Ask yourself these questions about the feature: Is it a magic item? Is it ...


12

The entire Hydra is affected, but it can activate the spell only once per turn and can only make one cone at a time A Hydra (or any monster) has only one action per turn and nothing in its statblock somehow grants it multiple actions. Creating a cone using dragon's breath is its own action as the spell requires a creature to "use an action to exhale energy"....


10

No. Dragon Shape says: You can take on the form of some of the world’s most fearsome creatures. Add the forms listed in dragon form to your wild shape list. Whenever you’re polymorphed into another form using wild shape, you gain resistance 5 to your choice of acid, cold, electricity, fire, or poison. If we look at Dragon Form it says: Breath Weapon (...


8

It might also be referring to poison gas traps Although the example traps in the DMG doesn't include a poison gas trap, there is an example of a poison gas trap in Xanathar's Guide to Everything, under Complex Traps. It's called a Poisoned Tempest trap on pp. 120-121. This trap has two effects, the first of which is called Poison Gas: Poison Gas (Initiative ...


7

Probably between CR 9 and 14 depending on how clever your Hydra is - assuming you bring the save DC to 16, more in line with expectations. The Hydra is a tricky beast to figure out balance for, due to its unreliable number of heads. However, if we look at the stats compared to the table, it seems that at least the base stats (ignoring the Multiple Heads ...


6

No, breath weapons are area "attack" special abilities. The details on breath weapons are available in the Universal Monster Rules. They are Su abilities and therefore require a default of a Standard Action to use (unless otherwise stated), deal area damage, and allow a Reflex Save. They do not provoke attacks of opportunity (as ranged attacks would) nor do ...


5

No, a dragon's breath weapon is not magical A dragon's breath weapon is not magical, as stated in the Sage Advice Compendium where they make an official ruling on this exact case (bold for emphasis mine): Is the breath weapon of a dragon magical? If you cast antimagic field, don armor of invulnerability, or use another feature of the game that protects ...


4

Dragons being able to breathe elements is an innate magical ability Dragons are inherently magical creatures, which is why their bodyparts are so sought-after for alchemy and magic item crafting. Being able to breathe fire is only one of the things that is magical about a dragon, most Red Dragons who can breathe fire will also be able to control fire in ...


2

The young red shadow dragon is a CR 13 monster. A young red dragon is CR 10. According to Dungeon Master's Guide page 274, under the heading "Creating Quick Monster Stats", the proficiency bonus for CR 10 is 4, and for CR 13 is 5. Since both dragons have the same ability scores, I suggest that the 1 DC difference is caused by this. I went through some (not ...


2

Erik's answer gives a very good breakdown of CR for your hydra, but here's an alternative version of the ability: Frost Breath (Recharge 5–6). The hydra exhales an icy blast from each head in a 30-foot cone. Because, if nothing else, keeping track of the recharge for each head will be annoying for you as a DM. As the Dragon's Breath spell is a 15-foot ...


1

Yes, any creature with a breath weapon (which is a special attack) is eligible for the feat Ability Focus, which would add +2 to the save DC against their breath weapon. This feat is usually intended for monsters, so GM discretion applies if a player character wants this feat. Prerequisite: Special attack. Benefit: Choose one of the creature’s special ...


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