Take out the cost-cheating cards like Aetherplasm and Belbe's Portal, and then maybe consider shaving off stuff like Cabal Coffers, Crypt Ghast, and Bubbling Muck until your deck is at the speed that you're aiming for
Adding the age counter and requiring the upkeep cost happens on the same trigger
But she's certainly not a bad card and there's a few notable ways to take advantage of her lifegain
Now you may be asking yourself, why would I want Kardur, who wants my opponents to attack each other with as many creatures as possible, to lead a deck if Im just going to kill all my opponents creatures
Cytoplast Manipulator The joke with Cytoplast Manipulator is that graft can move +1/+1 counters to opposing creatures when they enter play
We know how powerful the zero-cost cards are in a cascade brew that cast them immediately, so this thing is reliable there