Kaldheim is inspired by Norse mythology and Vikings, so expect to see Gods, Squirrels, and mythical monsters fight it out for survival
Some of them just dont hold up in 2020s MTG
Lifelink Is a Static Ability, Not A Triggered Ability As I mentioned above, Lifelink no longer uses the stack to gain life
"Decayed" means "This creature can't block" and "When this creature attacks, sacrifice it at end of combat." (9/24/2021) Decayed does not create any attacking requirements
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Its hard to play it in a very aggressive deck, when we cant use it to clear blockers out of the way, though you could potentially combine it with stuff like Stitched Mangler, Bounding Krasis, or Topplegeist to make it more reliable