I, II Put a +1/+1 counter on target creature you control with the greatest power
Counter-roll helps, but going too tight can just build a new problem into the mat
You technically can put multiple regeneration effects on a permanent at once, but the multiple effects serve no real purpose and will all go away the next time the permanent would be destroyed that turn
Theyre still potentially very scary, however, especially given the volume of support in the rest of the set
That said, there is something special about looking through a pack, and Modern Horizons 3 is a set with a lot of great cards The cards in the set should hold good value for a while, especially as people move on because of the high overall power level, and some of the lesser talked about cards will increase in price