MTG Salvation

Infiltrated Rebellion XUR
Sorcery (MR)
Target opponent creates X 1/1 red and blue Rogue creature tokens named Embedded Agent with "This creature attacks each turn if able." and "Whenever this creature deals combat damage to an opponent, that opponent draws a card."
Every great leader has to face resistance. The wise makes sure that the control that resistance even more strongly than they control their own empire.

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I like the flavor text very much, but there is a typo in it: "The wise make sure that they control...", and I also think that the first period shouldn't be there in the rules text. As for the card itself, it's very complicated but at least it does work as intended. This is certainly supposed to be a mythic.

Azologtep, Who Consumes XXBBB
Legendary Creature - Demon (M)
Flying, trample
Devour X
When you cast Azologtep, each opponent sacrifices X creatures. It enters the battlefield with an additional +1/+1 counter on it for each creature sacrificed this way.
1/0

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At the very least, reminder text is required for devour, as any non-evergreen keyword, even though on a mythic you can leave it off if there's no room, but MSE shows me there is room here, so it should have it. I also have a few doubts whether this actually works as intended in the rules. With devour not being a triggered ability, but an "as this enters" ability (that is, a static ability that modifies how this enters the battlefield), the value of X you declare when you cast this might actually be seen by devour, even though I'm not sure, I'd need to check the order of the various steps of casting a spell in the CR. What I know is that if devour actually was a triggered ability, it wouldn't work. In those cases, specific rules exception as needed (see Polukranos, World Eater and monstrosity for example).
Oh, I hadn't read the triggered ability yet. That is a perfect example of the value of X not passing from the mana cost to a triggered ETB ability. As written, this doesn't work in the rules. It would be easy enough to tweak it to work, but as is it doesn't. I'm sorry.

Familiar Faces XXUUBB
Sorcery (Rare)
Choose X target creatures you control from your graveyard and/or from the battlefield, then create a token that's a copy of each of them.

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I like the effect but I'm almost certain that the wording is wrong: something like "...then, for each of them, create a token that's a copy of it" would very probably be much closer to how this would be if it were printed for real. I have nothing else to say about this card, but I will admit that I would have liked to see some flavor text. There's plenty of room for it here.

Increasing Terror XBR
Sorcery (Rare)
Target opponent discards X cards. If Increasing Terror was cast from a graveyard, repeat this process for each other opponent. Increasing Terror deals damage to each player who discarded a card this way equal to the greatest converted mana cost among those cards.
Flashback XXBR

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Overall, I like this enough, and the piggybacking on the Increasing cycle from Innistrad works very well, but I do have a couple remarks. First, a rules doubt: I hope that repeating the process doesn't interfere with targeting rules, I'd need to check the CR. Second, an ambiguity in the text: if you're flashing this back, so you're making all opponents discard, do I look for the greatest CMC among all cards discarded and then all opponents take that same amount of damage, or do I check for each player singularly the greatest CMC among the cards that were specifically discarded by them? Does "among these cards" at the end refer to all discarded cards regardless of their owner (so the answer is the former) or to each player singularly (so the answer is the latter)? With the wording you used it's not clear. Still, there are cards with worse problems or that I like less in my bracket, so you might end up in the top 3 anyway.

Spontaneous Revelation X(U/R)(U/R)(U/R)
Instant R
Draw twice X cards, then discard X cards at random.
"The answer came to me in an instant. Like a lightning strike in the dead of night, all the details thrown into sharp contrast for a single heartbeat."
—Academy Director Royan Shole

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There's nothing wrong about this card design-wise or flavor-wise, but it's just not my style of card as a player, for just one reason: the words "at random" being there. I would never play it just for that reason. But as Maro often reminds us, if I don't like this kind of cards, it just means it's not for me. I'm sure there will certainly be people who like this effect. I'm just not among those people.

Earthquake Ariser X(R/G)
Creature--Hellion Hydra (Rare)
As an additional cost to cast this spell, sacrifice a land
Earthquake Ariser enters the battlefield with X +1/+1 counters on it
Whenever Earthquake Ariser deals combat damage to a player, you may activate activated abilities of land cards in your graveyard as though they were on the battlefield that many times this turn. Exile those land cards instead of paying T in those abilities' costs in this way
0/0

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There is a reason why I advised you to keep an eye on the formatting of your cards yesterday in the DCC. If we were in the MCC, this would just get a full zero in Quality. Name not bolded, double line in the type line (I understand that you wanted to represent an em dash, but you can just make one in several ways if you're in Windows, I'm sure there are ways in other OS's too, and if you use MSE it automatically uses it when you export the card as a text card for MTGS, that's what I do all the time with all my cards in all the contests I'm in, included Hapolk here), three periods missing at the end of each ability, and I'm also not sure about the wording of the last ability. Anyway, even if all those Quality mistakes were fixed, this card would still be just too complicated for my taste, again, especially because of the last ability. I'm sorry.