Oh, yes. Time for a new mono-Aether to emerge 
Couple questions.
1) Are the Dimensional Horrors available as standalones? 
2) Why are the Terrors upped mutants? We don't have upped mutants in this game; are you introducing new concepts and stuff?
3) What's the difference between an upped mutant and an unupped mutant? Do the upped mutants have better stats?
4) The 10+|10+ is based on the original creature's base stats, right?
Overall, very nice. It actually seems a little UP. 8 
for a 10+|10+ mutant straight off is slightly OP. However, this has a massive 5 or 4 turn delay. I would tone the price down to 7 or even 6 .
1) Unfortunately.. no. They are creatures from another dimension so only way to get them is through this gate/portal.
2) and 3) Yeah, I changed the text a bit while you were typing. Whether the mutants are upped or not makes no difference really. I just think the upped version should produce upped cards because it looks cooler that way.
4) I'm not sure. My original plan was that the mutant would just have like 10-15 in both stats but what you suggest is even better. I'm changing to to "original ATK|HP of the creature increased by +10|+10"
Would the Horror/Terror be spawned at the end of the 5th turn or the beginning of the 6th (allowing a quintessence straight away or not)?
It would be spawned as soon as the delay went away. So at the
end of turn giving your opponent a chance to get rid of it.
But yeah, it almost seems TOO expensive, but then again if its a mono-aether deck your probably hiding behind shields for a long time.
Its' a bit difficult to say without testing but I was thinking about decks that had 6 of these and tons of defense/delay. Once you would get 3-4 of these babies on the table, you would get 1 super mutant per turn for free! That would suck for your opponent.
I really like your delayed reaction series of cards thus far, are you going to make one for each element?
I am also curious if the horror and terror will be stand alone cards or be like ash and be only limited to this card.
I also very much approve of the mono feel to it for Aether, Its great.
Yep, the plan is to make 12 cards, one for each element. This is the 3rd.
And no, they wouldn't be available as stand-alone because this gate/portal is the only way to access that another dimension.
