Sheltron should be 1-2 second block

[RiisWolf]

I think Sheltron should block physical AND magical attacks. Especially since it's a half dome over your shield. Not to mention right now it's comparatively weak to Inner Beast where it can be popped in roughly 8 seconds less to a much greater effect (100% lifesteal + 20% less damage from ALL hits taken for 6 seconds)