Godbound:
An option for characters that have the Peak Human Word is to have their other Words granted by "a unique artefact that cannot be taken away". Go to a (theoretically existing) Shard Of Heaven with an artefact / variant Made God fragment / Creator failsafe variant that fuses with the first person who touches it and grants them Godbound powers (i would go with Peak Human, Artifical Inteligence (which can be a cyborg) and Artifice). Then grab some Celestial Shards and Seeds of Paradise from other (or the same) very isolated and safe Shards of Heaven. Make some artefacts, first one being a expendable item version of the greater gift of Luck which makes one thing possible in your future guaranteed, and then disappears – it is normally balanced by costing permanent gift points and being a one-off effect, but artefact rules use Celestial Shards, not limited character resources. And a seed of Paradise forms a pocket universe in which the user is an archdeity, which gives significant bonuses and ageless immortality. And it gives some free Divine Laws that can be set on the Paradise. It needs Dominion, but it can be quickly gained by sacrificing Shards, which you can get easily by raiding normally inacessable Heavens.
Make artefacts which hide you from divination (custom greater gift, Knowledge), protect from Time effects ( benefit of binding, Time), make mind reading show whatever you want (archpsion)...
The last one is useful for tricking Tests of Heart and similar.
GURPS. Just... GURPS. Greater wishes from the ruins of magical civilisations that blew up by critically failing Greater wish enchantments. ( meaning that some previously made Wishes, which were succesfully made, were not used). Get one point of Cosmic Variable Power. Get 4 Fate Points. Increase your IQ. Get Unusual Background (can train to gain broken ability x)...
There are multiple springs of youth described in a pyramid article on springs of youth.
There are Cosmic Artefacts in Dungeon Fantasy.
Pathfinder:
Grab a "definitely not a Starstone fragment" from FAR AWAY from Golarion (seriously, it should be something similar, but not the Starstone. It blocks dimensional travel around it, generates dangers and might be sentient.).
Gain Mythyc rank 10 immediately (not tier, rank – you dont need to do legendary things to raise it, as it can be immediately gained at 10). Use some of your 11-12 Mythyc powers for Beyond morality and three purchases of Divine Source. Take magic domain and divine subdomain as some of your new domains. You now have a 1/day spell-like Miracle. Give yourself an extra 1 permanent divine bonus to intelligence as Divine Intervention, and then over the next few days use it to give yourself the potential to learn divine, arcane and psionic (and primal) magic (as per the " (only) divine intervention can heal permanent loss of ability to cast spells"). You are now a Qasideity and can cast in Antimagic and Dead magic zones (like the entire rest of the multiverse).
Also, get some artefacts that are not in dangerous places. And some tomes and wishes for a plus 5 inherent bonus to all abilities. ( mythyc 10 grants at least 10 points to your stats, too.)
Anima Beyond Fantasy:
Put on your Headband Of Tricking Mind Readers (Godbound). Put on your cloak ( or whatever the shape of it is) and amulet (same) from the Godbound Useful Artefact list higher up too.
Set your detectable thoughts to nothing (NOT Void or Emptiness or something like that. Just block all detection.)
Stop time (pathfinder). Maybe even Argumented Mythyc Time Stop, but you can just use an artefact staff with the spell. ( Mythyc Surge helps with the check; and so do other abilities).
Planeswalk. Grab the Key Of Yigradsrill. Immediately planeswalk away.
With your Headband, the Key will not automatically act on any stray thought you have. In fact, you can control it perfectly by only allowing it to detect carefully controlled and designed thoughts that you wrote on your fake mind.
Enjoy the ability to create anything in Anima with Gnosis 30 or below and Presence 420 or below or level 15 or below. This includes carefully designed creatures with basically whatever Anima power you want, like instinctively casting Learning at arcane level on you.
You should note that in areas with no ambient Zeon, spells cost 10 zeon more, maintaining them costs twice as much, and zeon regeneration is halved.
You should also note that you can create full Zeon batteries with a capacity of 10000 zeon.
Yes, you can use it to create magic items. In fact, as a willing sacrifice of a gnosis 30 being produces the highest quality possible reagents in the game, you can directly create items made from the best possible ingredients, and with up to 420 points in powers.
Lorewise, a wizard in one story tried to gain Divinity by transforming the corpse of a minor god into a enchanted fluid, which then made a gnosis 20 enemy into a demigod. His demigod ability specifically says he counts as having a Gnosis of 30 for some cases. You dont have a 20 in gnosis (probably), but you can make it prepared specifically for you (as the wizard intended) and count as a willing sacrifice, by just not imagining any grudges and imagining desire to empower. Then you can use the bonus points for high Gnosis to buy Psionic or Spellcasting potential.
Dnd 3.5 has rebuilding rules. Go to a isolated, deity-less, uninhibited Sphere. Drink from a spring that is supposed to one day be guarded by elves. Give yourself a la 0 template. Paragon, specifically.
Okay, that might be too cheesy. But deities and demigods describe a idea for a setting in which divine ranks can be found as items, leftovers from the creation of the world. Just be careful.
Cradle:
Exposure to Madra makes someone capable of using Madra. Madra is a bridge to Soulfire, which is a bridge to Will. The writer sets up Vaults in his settings filled with everything needed to train "in case of isekai". That is a joke, but is also wog, and makes sense as something that would exist in every setting. Good enough sources of Aura function off-world.
Just be very, very careful and very, very stealthy.
If you think you can handle it, Hunger bindings can be useful too.
Gurren Lagann
Spiral power. Yes, you can gain it, even if it is not already in your genetics. Worst case, drain it from a piece of grass with a Hunger Binding and now you have some.
(Even if that is literally the gimmick behind his Supreme Blessings CYOA.)
