Giant Guardian is considered a world boss and is found in Northern Silverspring in a region called Tangea.
Level: 70 - Boss
Type: Golem
HP: 2,000,000+
Drops: Rumored to be Link Runes but because of the level cap, no raid has taken it down to confirm.
History: A dual raid (two raids talking on a custom channel) of end game characters attempted to take down the Giant Guardian and failed. The Giant Guardian resists almost every attack of non-endgame characters.