This part is more personal. I'm asking for some vulnerability so you can try to understand why I'm doing this.
This section is not an exhaustive look at why I'm doing this, but it's a good place to start learning a little about me.

A Trading Card Game is a card game where its game pieces and the effectiveness of those pieces are made to be collectable and tradeable with other players. You all get to have a different experience because the booster packs and boxes you open are all different. That's great and fun! That's why I got into it.

What they don't tell you is 99% of the cards in those booster packs and boxes are complete trash and a waste of paper. Some of these TCGs are so notorious, not only are the best cards in the highest rarity (meaning you only get a few in a whole booster box if you're lucky), they also shortprint the best ones, therefore driving up the artificial scarcity even more.

This means that actual GOOD cards in these TCGs are rare and cost a lot of money when you buy them from others. And you're going to need a full playset of them if you want to see them appear in your deck as much as possible. In most TCGs, you'll need 3-4 copies. The current market for these games has exploded, but the amount of times you need to buy them has gotten more frequent. The worse offenders ask its players to buy new product every 2-4 weeks.

But John! Only fools open booster packs! The secondary market is where it's at. That way you only buy singles of the cards you want! Yeah... some of these cards are as much as $20 a copy. Some are $100 a copy. You need 3-4 of those, by the way. You'll be doing that every 3-6 months, because the release frequency and powercreep of cards in these TCGs is how they get you keep buying. If you're playing at tournaments, you better pray the cards you paid so much money for don't get banned, because those cards just became effectively worthless.

It's cardboard crack. It's designed to be addictive.

Can you see how EASY it would be to turn Innomination into a Trading Card Game?
The business model a game uses is a key indicator of how the gameplay is sold to you, the player.
Innomination won't turn into a TCG. The game is literally designed so it makes no sense for it to become one.

I've always wanted to play a game like the TCGs I like without having to deal with the Trading part.
That's what Innomination is. It's just a card game.

Powercreep is complicated and takes an example to answer. I'll try to keep it simple.

Let's say I have a creature with 1 strength, 1 life with a resource cost of 1.
I also have a creature with 2 strength, 2 life, and a resource cost of 2.

That game comes out with a creature with 2 strength, 1 life, and a resource cost of 1.
This creature can easily attack the 2-cost creature and destroy it.
Why would you ever play the 2-cost creature if it's going to be beat by a 1-cost creature? You would rather have as many 1-cost 2/1 creatures as possible since they are so efficient compared to the creature that costs 2.

This alone is not powercreep.

In order to make 2-cost creatures good again, the developers have to make every other 2-cost creature have at least 3 life so they don't die to the 1-cost creature with 2 strength.

But now, why would players play ANY 3-cost creature with 3 life when the 2-cost creatures are more efficient? So the developers have to make the 3-cost creatures in the next set have 4 life... but why would the players play ANY of the 4-cost creatures with 4 life when the 3-cost creatures are more efficient? So the 4-cost creatures need to have 5 life...

Do you see the problem? It just keeps happening, going all of the way up the ladder. Not only does every higher-costed creature need to have higher life to be more efficient due to the initial bump, every card before the bump will never see play anymore because they're too weak. Now the players have to buy the better creatures in order to compete.

This is powercreep.

No, not necessarily. Innomination will have powercreep. A slow, steady powercreep is healthy for a game.
If there's no powercreep, the game will grow stale. There would come a point where card effects would never get better than what's already in the game. Developers trying to limit powercreep tends to go towards complexity creep, instead. Stuff gets complicated for its own sake. This can be good, but it can also be bad.

Innomination is a card game that can grow wide. The first set is the best foundation I can think of to show players what this game can do and what it isn't afraid to do. There are things in Innomination that I believe a TCG wouldn't dare do.