It took 25 years for Diablo 2 to get a new class, and less than 2 weeks for players to figure out how to become invincible Warlocks with demon meat shields

Diablo 2 Resurrected's new Warlock class.

To mark the 30th anniversary of the series, and 35th anniversary of the company, Blizzard's put out a new expansion for Diablo 2, called Reign of the Warlock. The central feature is a fresh character class - the first in 25 years - the Warlock, who deals in summoning magic, and a huge exploit using it has been uncovered.

Among the Warlock's characteristics are a pair of skills, Bind Demon and Blood Oath, that prove to be pretty useful when combined. Like 'making you more or less untouchable' levels of useful. Diablo YouTuber Coooley managed to find a way of deploying them that essentially turns you immortal, as demonstrated at the start of his video explaining it by his character standing in the middle of three Prime Evils raising hellfire.