Obelisk Spider

Reach
Whenever Obelisk Spider deals combat damage
to a creature, put a -1/-1 counter on that creature.
Whenever you put one or more -1/-1 counters
on a creature, each opponent loses 1 life and you gain
1 life.

It arrived on Earth in a massive cataclysmic event
similar to an asteroid impact, landing in a location in
North America that would eventually become
Derry, Maine.