I'm going to do a short series of things about one deck...and how it got built. Epic, right? But, really, it's just to solidify things in my own head. It's a pretty standard deck, using one of my favorite sets - DLS - and one of my least favorite - MHG - and it's the first really potent cosmic deck I ever made.
Here is the core of one of my all-time favorite decks.
Plasma, Replacement Herald
We Are Legion
Saturn Girl, Imra Ardeen
I think you're picking up where this is going pretty damn quickly. Those three cards, only one of them a rare, are the powerful core of one of the most efficient life-gain decks I've ever seen.
Next time? Building it from the ground up.