Even if you take this, if you force Grixis, you might end up with a 'weak deck that can't do anything else but win if I cast this' if the cards don't come together
As you can see, these numbers go up in a hurry once Revised shows up, which tracks with Magics transition from that cool game you saw folks play when you went to Gen Con last year to every schoolkid in the country knows what a Shivan Dragon is. And the reality is that the stuff from the ABU era is probably even scarcer than this list makes it out to be
Creatures you control get +1/+0 until end of turn
An example is Esper Valigarmanda, which is a Red card with 3 power and toughness, and a set of effects that will progress over time, like usual saga cards
It doesnt stack, but it doesnt need to
We all know Darksteel Forge is insanely powerful in an artifact deck