It's currently being selled by the minimum price of $ 0 (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) At the beginning of each player's upkeep, Cold Snap deals damage to that player equal to the number of snow lands they control
To me the viable picks are Liliana, Sneak Attack, Polluted Delta, Jackal Pup and Bloodbraid Elf
She has a static ability that means whenever an aura spell that you cast hits the battlefield, you can search your library for another aura that costs as much or less, and put it into play attached to Light-Paws
Magic proxies usually replace expensive singles
I say things like Deaths Shadow is easy to play, but thats really Deaths Shadow is easy to play if your job has been playing games with these cards since Bitterblossom was in Standard. Im a very heuristics-based player, and fortunately for you that lets me put a lot of the tips and tricks for what I know about these cards into easy-to-digest snippets
This seams like reasonable removal, especially in EDH