Saw the link to your deck in the 'lifespan of an EDH deck' thread. I was wondering if Soul of the Harvest might be a better card than Primordial Sage. It's a bigger body, and it works with anytime stuff comes out of your graveyard. It doesn't draw if your creature is countered, but the frequency of that is probably not that high to make a difference. Also, I would consider looking at the card Lifeline. It's got some really great effects with ETB effects, and if you pull off your Kamahl trick turning all of their lands into creatures, they might block more confidently with their lands, expecting to get them back. In that scenario, you have until the end of turn to destroy Lifeline, really screwing them over.

I read up on Lifeline, it looks like you'd have to take it out before damage was dealt for their creatures (or lands in this case) to not come back. Sorry for any misinformation, it is still an awesome card.

Thank you for the comments; If you take a second look, Soul of the Harvest is actually in the deck already, along with Primordial Sage , because you can never have enough draw engines. And as much as I love Lifeline , I don't want to run it simply because my opponents can get creatures back as well, and while I don't run mass removal, I prefer to trample over their creatures and keep them dead.

Oh wow, I can't believe I missed that, sorry. The lifeline thing is definitely not for everyone, some decks do run better without it. Good luck with constantly improving your deck!