(R3)
Even with the flavour justification, I find this card extremely difficult to swallow in earth. The name heavily, heavily implies an air card and has nothing that makes sense in earth, so that would be the first thing to adjust.
I also severely question its power, perhaps being too weak; it is just a crappier, more temporary form of procrastination, after all.
Everything about this heavily implies an air card - but air is restricted to me. Air would of course have been my first choice.
Personally, I'm rather fond of the chosen element for the card. Air image, air name - oh, it's the opposite of air. I think it's a nice twist on what would otherwise be a cliché. Earth has plenty of delaying card - Iridium Warden as I mentioned, Basilisk Blood as Aves mentioned. Admittedly no mass effect cards come to mind, but why not start the trend?
Crappier Turtle Shield? Very much so! I'd lower the cost if I could.
Don't like it? Go vote for Linkcat
Those restrictions are really tough! (Seriously, with that image.) I agree with Espithel that the name could use a change to make it feel more earthy-- perhaps something related to high altitude terrain, or along those lines.
For balancing, I suggest using BB as a basis.
Although that would be nice, I struggled to come up with many ideas for the prompt - especially ones with a word that's less than three characters. As it is, I like the juxtaposition between earth and air.
Forgive me, but I don't see how I could balance this against Basilisk Blood - they seem like totally different cards to me, with the exception of the delaying aspect. Perhaps you'd be so kind as to elaborate?