The Doorstop is a Demon Unique tower shield with no boss attached: it drops anywhere in Hell, most often from H7 up (rarer below that home difficulty, never above it), and nowhere else. Every copy is item level 110, and there 0.2% of what falls comes up Unique. It is built on Sovereign Portcullis Tower Shield — step 6 of the Portcullis Tower Shield line, item level 80 and up.

It always rolls the same numbers: +64 Armor, −4% Move Speed, +40 Magic Defense, +90 Armor, +-4% Movement Speed, +58% Guard Power, +816 Ward and +29% Cooldown Recovery.

One Unique drop in 40 is a Mythical copy: the same item carrying 15–25% Mythical Energy that boosts every stat on it and can never be changed; the 15% floor is 10 times as common as the perfect 25%.

On top of that it carries The Doorstop — Bulwark's charge hits twice as hard and applies Crumble, but its plates ward 40% less.

It leans into Crumble.

Wearing it hands you Bulwark.

“It is not a shield. It is a door, and you are the frame.”