Metamagic
Metamagic rods do not exist.
Metamagic feats have been altered as follows:
Metamagic feats may be applied to spells spontaneously and do not increase the spell slot used, however, if the level increase would have increased the spell slot beyond what you can cast, you cannot apply that metamagic feat (or combination of feats). For example, if you take quicken spell, you can only apply it to 1st level spells if your highest caster slot is 5. When you get 6th level slots you could apply it to 1st and 2nd level spells.
You may apply the metamagic feat up to 2/day.
You may take a metamagic feat multiple times to increase the uses per day for that feat, up to a max of 6/day.
Metamagic feats do not increase the casting time of spells regardless of caster type.
Disallowed Feats/Traits
Leadership is not allowed, nor is the trait Finding Haleen.
Limitations on Certain Forms of Magic
No form of magic, racial bonus, class feature, feat, etc can be used to gain any form of flight or levitation. (Feather fall is fine).
Likewise no form of magic, racial bonus, class feature, feat, etc can be used to gain teleportation, dimension door, or like abilities.
There will occasionally be potions or wands or other limited use magic items to grant these abilities. I promise not every encounter will be against flying creatures, but some will, so buy appropriate weapons even if it is not your characters strong point.
Automatic Bonus Progression Changes
At the time you gain +1 weapons and armor, you may also buy (or craft) a +1 non-enhancement bonus for the equipment without taking the penalty against the enhancement bonus. This increases at each enhancement bonus progression. So, at level 4 you may attune a weapon to be +1, and also make that weapon flaming, or keen, or whatever +1 equivalent with the appropriate cost (6000gp in this case).
Legendary gifts starting at level 19-30 will grant 3 per level instead of the amount listed in the chart. For a final total of 36 gifts if you survive to level 20/Tier 10.
Casters may spend 1/2/3/4/5 gifts respectively to increase their spell slot cap (for purposes of metamagic application). So for example, a caster with ninth level spell slots may spend 1 gift to effectively have 10th level spell slots (no slots are actually granted) and therefore cast metamagic spells as 10th level adjusted level. The same caster may then spend 2 more gifts to increase to 11th, 3 more gifts to increase to 12th, etc., to a max of +5 effective slots.
Mythic Vital Strike
Mythic vital strike is not based on the number of dice rolled, but rather on the sets of dice rolled. So a weapon that does 2d4, using vital strike to get 4d4, with mythic vital strike the multiplier on the strength and other bonuses is x2, not x4.
Killing Mythic Creatures
When a mythic creature is killed "something" will happen. It might be a buff to the party, a buff to the slayer, or a debuff to either.
Killing mythic creatures is how the players gain additional mythic tiers. It will not always go to the player landing the killing blow as the intent is to keep the players fairly even with each other on tiers and class levels.
Dealing With Traps
Disable device will not simply de-activate a trap. Rather instead it will give clues how to disable or avoid the trap. Some things will be obvious. Pit trap? The obvious solution is jump over it, or go around it if placement of walls permits. The higher the roll the better information on options for disabling or avoiding the trap, eg. place a torch or other sticklike object in that hole there to prevent the counter-weights from moving.
