Don't you feel like this would be helping the opponent out more then you? They get to play a free creature without using a turn or any quanta, but the player of this card is spending quanta to get a copy of the opponents creature. Maybe make the delay of your creature nothing?
I was originally thinking about this when I first designed it as a
and then as an
card. I realized, however, that it fits best in time for both thematic and balance reasons and that the benefits outweight the quanta drawback if combo'd with time and aether cards appropriately.
It is a similar card to Mindgate, with the difference of not having the extra quanta costs for playing the card, and instead be penalized with turn delay along with the risk of the creature dieing before being able to attack. Even as it also gives an advantage to the opponent, certain cards like 
Reverse Time or Lightning could mitigate the enemy potential. The card is powerful and more viable and splashable in non-rainbows than Mindgate, but requires other cards to truly make the most of it. I like this idea.
Exacyly. Being in the time element gives the player the option of either packing CC and using it to attempt to eliminate enemy creatures before they can attack or else you can pack eternity or rewind and use it as a source of creature advantage.
With RT, you can get multiple copies of your opponent's creatures while they get stuck with one each... and get their draw clogged up in the process.
And, if the quartet pillars and / or other quanta generator cards from cygnia ever get added (big if of course... *sigh*) packing in cardinal pillars would let you combo this with scarabs and pharaohs. I.e. you would just eat the creatures it summons for the opponent.
Alternately, you could make use of quint or anubis to protect your own creatures that get summoned while rewinding or lightening bolting theirs.
