Number47 said:
"Must have"? It is certainly good, but it is an eighth level spell! It may be great in three and four-spell combos, but alone it is not a game-winner. Is it better than Horrid Wilting (15d8 minimum to a large group at longe range)? Is it better than Otto's Irresistable Dance or Maze (no saving throw spells)? Is it better than Summon Monster VIII (look up the stats for elder elemental)?
I will admit it is the best non-combat oriented eighth level wizard spell, but how many of those are there, even?
These comparisons are based on core-rulebook only, that's all I have.
My point is that it will be a definite "must have" just for the amount of protection it provides. It will be a "top slot" for an 8th level wizard giving spell selection any kind of thought.
Not only is it non-combat (stopping scry, etc), it is also
very combat capable, stopping a large number of combat spells from affecting the caster. Throw in a duration of 1 day for the spell and you have a great all-around spell, useful for many purposes. Too useful? I guess that is for the individual DM to figure out.
As for being an 8th level spell, it certainly is good. The thing of it is, in 3rd edition we will be seeing it cast more. Unlike the rarity of high levels in other editions (where it might take years of dedicated playing regularly to reach the levels you'd need to cast an 8th level spell), it will not be uncommon to see PC's of that power level be reached in this edition.
Just out of curiosity, I pulled out my old AD&D PHB and looked up Mind Blank:
Mind Blank
Level: 8
Range: 3"
Duration: 1 day
Area of Effect: One creature
Components: V,S
Casting Time: 1 segment
Saving Throw: None
Explaination/description: When the very powerful Mind Blank spell is cast, the recipient is totally protected from all devices and/or spells which detect, influenceor read emotions and/or thoughts. Protection includes Augery, Charm, Command, Confusion, Divination [Zenon note: Divination is a 4th level cleric spell, a super augery], Empathy (all forms), Fear, Feeblemind, Mass Suggestion, Phantasmal Killer, Possesion, Rulership, Soul Trapping, Suggestion and Telepathy. Cloaking protection also extendsto prevention of discovery or information gatheringby crystal balls or other scrying devices, Clairaudience, Clairvoyance, Communing, Contact Other Planes or wish realted methods [wishing, limited wish, alter reality]Of course, exceeding powerful deities would be able to penetrate the spells powers. Note that this spell also protects from psionic-related detection and/or influence such as Domination (or Mass Domination), Hypnosis, Invisibility (the psionic sort is mind related), and Precognition, plus those powers already covered as spells.
Jusy looking at the old edition version brought to my mind the huge selection of spells that Mind Blank would protect against. The new version is already as powerful, if not more so. Now if you add in that it defeats things like See Invisible, True Strike, and others we may not have realized yet, how much more powerful is it?
Which 8th levels spell would I rather have? Let's see:
Otto's Irresistable Dance: Sure, no save. Range: Touch, duration 1d4 rounds, subject to SR.
Maze: Again, no save. Range: Close. Target: one creature, no SR. Max time that it can trap a creature? Less than 3 Int: 2d4 minutes.
Horrid Wilting: Save for Fort (1/2 damage) Range: Long. Target No two of which are more that 60' apart. 15d8 (average around 60-70 points, saved damge is average around 30-35).
Summon Monster: Good for 1 round per level (15 in your example). Nice stats on the Elder Elemental.
Mind Blank: Good against all divinations, mind effecting spells, mind influencing spells, Wishes or Miracles used to locate me, Duration of 1 day (BTW, it protects against Otto's Irresistable Dance, which has a Mind-Affecting in the type). Hold Person (another Mind-affecting spell), Antipathy(9th level, opps: Mind Affecting, doesn't stop me), Bane, Binding (another 8th levels spell, Mind-Affecting, stops it cold), Bless, Color Spray (Mind-Affecting), Demand (another 8th level spell, Mind-Affecting), Enthrall (either spell or Bard ability), Geas/Quest (Mind-Affecting that normally has no save), Magic Jar, Modify Memory, Nightmare, Sympathy (9th level, Mind-Affecting), I would argue also for Symbols of Discord; Fear; Pain; Insanity; Hopelessness; Pain; Persuasion; Sleep, Trap the Soul (tries to affect my mind, I would argue for it) and Weird (9th level, Mind-Affecting), Zone of Truth. [Just from the PHB]. All this lasts for 1 day per casting.
But before I choose, let me think that by extension that Mind Blank will protect me from all creatures (or potions, devices, artifacts, etc.) whose abilities are a spell-like or supernatural effect of any of the above (like a Umber Hulk's gaze), and any of the spells cast on me have no way to penetrate that protection (no caster check, spell penetration, nothing). It is also currently being argued to protect from See Invisible, so it won't let any magic target me (unless it's an area effect and you have a clue where I'm at before you cast it).
Hmmm. Which do you think I should pick?
Do you see what I'm saying? It's already a immensely powerful spell without adding anything to it.
{edit} Heck, I'll even argue that it should protect from the negative effects from an Unhallow or Forbiddance, since both spells need to detect my alignment, which per Mind Blank, is undetectable by anything sort or direct detection by a Deity.