Its a clever way to represent the effects limited duration
A six mana 5/5 is nothing to write home about, but Slurks ability to buff your entire board when one of your creatures dies in a +1/+1 counter-centric strategy certainly is, giving you some very solid insurance against removal and tricky combat steps
Cantrips like Opt and Consider are essential: they give me cheap card selection and the ability to dig for answers, and when paired with value engines like Talrand, Sky Summoner and Murmuring Mystic, they can add up to a massive board before long
You can pick this up at market price for $21.93 but not much lower at the time of writing, as Lightning's value seems to be slowly spiking as well
Energy Chamber gives you a counter every upkeep, and Power Conduit is kind of like Moxite Refinery, but on a smaller scale
In artifact removal, green was #1, red #2, and white #3