My friend is DMing a campaign, and I've been helping him balance out the homebrew content the players request. The most recent request is a custom familiar that the PC is getting through the Magic Initiate Feat to steal the Find Familiar spell.
To support the custom familiar, the player cited Volo's Guide to Monsters with:
Variant: Familiars Any spellcaster that can cast the find familiar spell (such as an apprentice, warlock, or wizard) is likely to have a familiar. The familiar can be one of the creatures described in the spell (see the Player's Handbook) or some other Tiny monster, such as a cranium rat, a crawling claw, a gazer, an imp, a pseudodragon, or a quasit.
Some of the balance difficulty comes from the fact that they want a monster not in the Monster Manual. The player is hell-bent on having a crystal as their familiar, and created this:
Tiny ooze, chaotic evil
Armor Class 12
Hit Points 3 (1d4)
Speed 10 ft., burrow 5 ft.
STR 1 (−5)
DEX 8 (-1)
CON 12 (+1)
INT 10 (+0)
WIS 3 (-4)
CHA 1 (-5)
Skills: Arcana +2
Senses blindsight 10 ft, passive Perception 6
Challenge 0 (10 XP)
Otherwordly Resilience: The Eldritch Crystal takes no damage from damaging spells, and no additional damage from magical weapons.
Innate Spellcasting: The Eldritch Crystal can cast either Blur or Meld into Stone once per short or long rest.
Is it a balanced familiar? If not, what would make it balanced?
Notes on specific features:
- The Ooze choice (instead of, say, Aberration, Construct, or Fiend) was because of some 3.5e crystalline oozes.
- The magic resistance was specifically asked for because the player is a Forge Cleric who's getting this familiar through a feat. The class gets fire immunity, and the player wanted a familiar who wouldn't be hurt by all the splash and flames.