I would say the card cost should be lower, because you have to pay for the creature and wait for a turn for it be useful. Along with the card's summoning sickness, you have to wait for a minimum for two turns for the card to be useful
Sounds good - lowered from 9 | 7 to 6 | 4. What do you mean by "summoning sickness"? Is that just the delay I added or something else I've somehow missed? The delay was mostly to stop duped creatures doing anything as soon as they're summoned.
Summoning sickness simply means that you can't use the card's ability on the exact turn you play it. For example, playing a Golden Hourglass does not allow you to use Hasten once you play Hourglass.