Level 1: 1, Level 2/3: 2, Level 4/5: 3 etc.

6, 11, 16 unlock new tiers.

Max out at Eldritch Blast plus 12 Invocations known

Two main options using spellbooks.

• Cleric-style spellbook (all spells known, limited spell slots to put them in)
• Take bonus feats to choose which invocations to obtain
• Simply unlocks all spells, then enforce through the spell slot functions what is available so it can be put on the quickbar and refreshed so unlimited (eg a heartbeat script)
• Have Eldritch Blast as level 1, and unlock more slots as they advance appropriate to the 12 given ones mainly for aesthetics. Technically they could take 12 "least" ones

Second option is more spell-book-choosy so easier to parse the available invocations:

• Sorcerer-style spellbook (limited spells known, spell slots per level but any can be cast, just set it to something high like 100)
• SpellKnownTable we simplify, the levels we use are:
  • 0 - Eldritch Blast is a "cantrip" so always selected
  • 1 - Least
  • 2 - Lesser
  • 3 - Greater
  • 4 - Dark
    • The main jank on this is: Enemy Counterspells are much more effective, Automatic metamagic works more easily, and concentration checks are much easier
    • We can work around some aspects like ResistSpell (ie globes etc.) with custom checks.
    • Would need a new style of spell book to accommodate these things, or a "RealLevel" in spells.2da for these aspects...!

The other option is feats which are a pain, since you can't inherently swap them out or find them on the spell radial:

• ActionCastSpell with cheat cast, might accommodate some of this
  • Can be from a NUI panel (ie done after level up) but no quickbar use then but can swap them out
  • Can be done from feats but this makes them permanent and not swappable (not the worst thing since it is easier to access on quickbar still)
  • For Arcane Spell Failure portion can apply in the spell hook. This should have concentration checks as normal, but I don't think counterspelling will work as usual. Need to check how cheat-cast spells fully work.

Eldritch Blast changes; usually a toggle, sometimes a permanent choice

Need spell-like ability versions

NB: For now not enabled (except the automatic variants which cannot be disabled)

We should probably mimic this with feats allowing some NUI toggles, since it allows it to be enabled

Of course limits it to Empower, Maximise, Extend and possibly Still (just don't do ASF check in spell hook). Silent and quicken are not possible.

We could have the original Metamagic feats work but in a sense restrict them to a limited amount of uses/day (and limit spell level it can use based on caster level) using the spell book manipulations. Simplifies things mechanically.

We could also add bonus feats when the Ability version feats are chosen, that are disabled after X uses...but needs proper spell books.