General: I'm not sure what you mean by formatting being off, but I do intent to revise these until they are as good as possible.
I will eventually update this with more complete information as the need arises. It might be difficult at times to reference existing cards if you miss some of them while searching.
Templating (rules text) fixes:
Cataclysmic Flames
At the beginning of each player's end step, Cataclysmic Flames deals 4 damage to that player unless that player has no cards in hand.
At the beginning of each player's end step, Cataclysmic Flames deals 4 damage to that player unless a creature he or she controls attacked this turn.
*Special note: I believe that if you want both conditions to be independent, they need to be written separately on different lines. It may not be necessary for this purpose, but it is the correct way of writing the text, I think. Feel free to show me something on Gatherer that contradicts this, if you know of it.
Galascoda, Beyond Legend
Shroud, indestructible
Other creatures you control have indestructible as long as you control five or more creatures.
Creatures you control get +4/+4 as long as you control ten or more creatures.
*Keyword order doesn't really matter. I just think that hexproof and shroud should come before indestructible because it's slightly more commonly found. Note that indestructible, like other keyword abilities, use "has/have" and not "is/are" with the newest changes to the errata. If it already has indestructible, then it ought to be written "other creatures". The conditions are written after the effect on all cards that specify "as long as". Also, one more thing about balance: I'm not too sure that it should have shroud and indestructible inherently, without some kind of condition. Perhaps once you adjust it, you might have it receive indestructible from having a set amount of creatures rather than immediately having it. Or, perhaps there are cards in the set to make creatures lose certain abilities?
The Dark One's Coming
Split second
The Dark One's Coming costs {1} less to cast for each creature card in a graveyard.
...
*Notice as well that keywords follow the capitalisation rules for standard English.
The Final Epiphany
Shroud
Whenever a player casts a spell, put a knowledge counter on The Final Epiphany.
Whenever you're dealt damage, remove a knowledge counter from The Final Epiphany.
You win the game if there are twenty or more knowledge counters on The Final Epiphany.
*Mechanically, each source of damage counts as one instance. The third line, meanwhile, is possible, but "you win the game" conditions are generally triggered at the beginning of upkeep. In which case, reference Helix Pinnacle.
Gatherer's Stone
At the beginning of your upkeep, if you control a land of each basic land type, transform Gatherer's Stone.
Shoulka, World Heart Titan
Trample, hexproof
Shoulka, World Heart Titan's power and toughness are each equal to the number of lands on the battlefield.
At the beginning of your upkeep, your life total becomes equal to the number of lands on the battlefield.
*Gatherer's Stone with this wording will count a dual land as both types, so you can transform it with 3 lands. The order of trample and hexproof does matter here.