我現在要教你如何創造D&D 5E的怪物。
我將會逐條說明monster's statistics讓你學習其規則。
1.Name
2.Size：Tiny、Small、Medium、Large、Huge、Gargantuan。
3.Type：Aberration、Beast、Celestial、Constructs、Dragons、Elementals、Fey、Fiends、Giants、Humanoids、Monstrosities、Oozes、Plant、Undead。
4.Tags：怪物可能會具有一個或多個Tags，代表更細緻的分類。Tags會以（）附在Type之後，例如：Humanoids（Orc）。
5.Alignment：Lawful Good、Lawful Neutral、Lawful Evil、Neutral Good、True Neutral、Neutral Evil、Chaotic Good、Chaotic Neutral、Chaotic Evil、Unaligned、Any alignment。
5.AC（Armor Class）：AC=基礎值10+Dexterity Ability modifiers+Other（盾牌、特殊能力等等）。天生護甲或穿戴護甲可以提高計算AC時的基礎值，但笨重的護甲會限制敏捷調整值的上限，Medium Armor最多+2，Heavy Armor最多+0。
6.Hit Points：寫作「期望值（xDy+n）」。代表x顆n面的生命骰+Constitution Ability modifiers。生命骰大小取決於體型，Tiny（D4）、Small（D6）、Medium（D8）、Large（D10）、Huge（D12）、Gargantuan（D20）。
之後都只回答「理解」。
理解
7.Speed：表示步行的速度。多數生物為30 ft，0 ft=沒有步行能力。若該生物有以下四種中的特殊移動能力，也在這一併寫上其速度。
7-1.Burrow：能夠穿越沙地，土地，泥地，以及冰面。
7-2.Climb：能夠快速爬過各種表面。
7-3.Fly：能夠飛。某些生物能夠Hover，代表他們可以停留在空中不動，寫作：Fly（Hover）。
7-4.Swim：有擅長游泳的身體或能力。
8.Ability Scores：範圍1到30，10=普通人、20=超級英雄、30=神級。分為：Strength、Dexterity、Constitution、Intelligent、Wisdom、Charisma。寫出該怪物的Ability Scores和Ability modifiers，如：Str 16 (+3)。
9.Saving Throws：若該怪物熟練於某類Saving Throw或有其他特殊的調整值則在此寫上加值。加值=對應的Ability modifiers+Proficiency Bonus+Other。怪物的Proficiency Bonus取決於其CR：CR0~4為+2、5~8為+3、9~5為+4、13~16為+5、17~20為+6、21~24為+7、25~28為+8、29~30為+7。
10.Skills：該怪物擅長的Skills加值，加值=對應的Ability modifiers+Proficiency Bonus+Other。某些特殊能力可以讓Proficiency Bonus應用於特定Skills時以兩倍計算。Skills list：Athletics、Acrobatics、Sleight of Hand、Stealth、Arcana、History、Investigation、Nature、Religion 、Animal Handling、Animal Handling、Medicine、Perception、Survival、Deception、Intimidation、Performance、Persuasion。
理解
11.Damage Effect：某些怪物對特定類型的傷害更有耐性或更脆弱，其Effect分為Resistance、Vulnerability、Immunities。每種Effect都搭配一個傷害類型：Bludgeoning、Piercing、Slashing、Acid、Cold、Fire、Force、Lightning、Necrotic、Poison、Psychic、Radiant、Thunder。
12.Conditions Immunities：某些怪物免疫特定Conditions。Conditions list：Blinded、Charmed、Deafened、Frightened、Grappled、Incapacitated、Paralyzed、Petrified、Exhaustion、Poisoned、Prone、Restrained、Stunned、Unconscious。
13.Senses：寫出怪物的passive Perception數值，計算方法為10+Wisdom Ability modifiers，若熟練Perception再加上Proficiency Bonus。若有特殊感官則列出並加上其有效半徑。特殊感官有：Blindsight、Darkvision、Tremorsense、Truesight。
14.Languages：該怪物掌握的語言。若有Telepathy則寫出並附上其有效半徑。
15.CR（Challenge Rating）：用0到30衡量怪物有多強大，0到1之間還有1/8、1/4、1/2。
16.Special Traits：怪物可能有數種正面或負面的特性。典型的特性有：Innate Spellcasting、Spellcasting、Psionics。
17.Actions：怪物能執行的常規動作以外的動作。
理解
創造一個CR11的Aberration。
Name: Star Leviathan
Size: Huge
Type: Aberration
Tags:
Alignment: Neutral
AC: 21 (natural armor)
Hit Points: 297 (17d12+153)
Speed: 30 ft., swim 60 ft.
Ability Scores:
- Str +20 (+5)
- Dex +12 (+1)
- Con +20 (+5)
- Int +16 (+3)
- Wis +18 (+4)
- Cha +10 (+0)
Saving Throws:
- Str +11
- Con +11
- Int +8
- Wis +9
Skills: Perception +9
Damage Effect:
- Immunity to acid damage
- Vulnerability to force damage
Condition Immunities: Paralyzed, Petrified
Senses:
- Blindsight 60 ft.
- Truesight 60 ft.
Languages: Deep Speech, telepathy 120 ft.
CR: 11
Special Traits:
- Innate Spellcasting: The Star Leviathan can cast the following spells innately, using wisdom as its spellcasting ability (DC 17, +9 to hit with spell attacks): 3/day each: Control Water, Control Weather, Telekinesis
- Magic Resistance: The Star Leviathan has advantage on saving throws against spells and other magical effects.
- Amorphous: The Star Leviathan can move through a space as narrow as 1 inch wide without squeezing.
Actions:
- Multiattack: The Star Leviathan can use its tentacles and its bite attack in the same turn.
- Tentacles: Melee Weapon Attack: +11 to hit, reach 15 ft., one creature. Hit: 15 (2d8 + 6) bludgeoning damage and the target is grappled (escape DC 17).
- Bite: Melee Weapon Attack: +11 to hit, reach 5 ft., one creature. Hit: 20 (3d8 + 6) piercing damage.
- Mind Drain (Recharge 5-6): The Star Leviathan targets one creature it can see within 30 ft. of it. The target must make a DC 17 Intelligence saving throw or take 24 (7d6) psychic damage, and the Leviathan regains hit points equal to the damage dealt. If the target is reduced to 0 hit points by this damage, it dies and its brain is absorbed by the Leviathan.
Description: Star Leviathan is a giant, amorphous monster that dwells in the deep waters of the ocean. It's body is made of a thick, rubbery skin that is able to withstand the pressure of the deep sea. The Star Leviathan has multiple tentacles, each as long as a small ship, that can be used to grapple and crush its prey. The beast is also able to drain the mind of its enemies, making it feared by sailors and sea-farers.
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