>Monster modifications: Lich
>
>These features can be used to change a monster's difficulty if your adventurers are higher level but you want the monster to 
##### Undead abilities
| d4 |ability| CR increase |
|:----:|:-------------|
|1| Reanimating influence  | 2 |
|2| Life force drain  | 1 |
|3|Alternate original form | 1 per 10 CR of the original form |
|4|Lesser lich | -10 |


>Reanimating influence: any creature that dies in the lich's lair turns into a zombie in 1d4 rounds. It gains the wisdom, intelligence, charisma, damage and condition imunnities of a zombie, it's type becomes undead, it's alignment changes to the alignment of the lich, and it follows the lich's commands. Constructs, undead, celestials, elementals, plants, and fiends are immune to this effect.

>Life force drain: the lich has the life force drain action  
***Life Force Drain.*** *Ranged Spell Attack:* +12 to hit, range 45ft., one creature. *Hit*: 12 (2d8 + 2) necrotic damage and the lich regains hit points equal to the damage dealt.

>Alternate original form: the lich has the statistics of any creatire that could be affected by the reanimating influence ability but with the lich's ability scores, HP, AC, damage resistances and immunities if not more. It also has the lich's paralysing touch attack

>Lesser lich: the lich is a lesser lich


___
> ## Lesser Lich
>*Medium undead, any evil alignment*
> ___
> - **Armor Class** 15 (Natural Armor)
> - **Hit Points** 65( + 1)
> - **Speed** 30ft.
>___
>|STR|DEX|CON|INT|WIS|CHA|
>|:---:|:---:|:---:|:---:|:---:|:---:|
>|11 (+0)|13 (+1)|15 (+2)|16 (+3)|11 (+0)|13 (+1)|
>___
> - **Condition Immunities** None
> - **Senses** passive Perception 13
> - **Languages** Common Plus Up To 2 Other Languages
> - **Challenge** 11 (7,200 XP)
> ___
>***Lesser rejuvenation***: if the lesser lich dies it makes a DC 10 constitution saving throw. On a success, this trait functions like a normal lich's rejuvenation
> ### Actions
> ***Cold touch.*** *Melee spell Attack:* +6 to hit, reach 5ft., one target. *Hit* 5 (1d6 + 2) cold damage