Bob Goblin has some regrets
Bob Goblin stole one (1) sandwich. The sentence for this, in Shem, is the pit. He lands in a cavern lit from the inside, full of things that glow and bite, and at the bottom of every level hangs the Plancktopus — one enormous eye and a great many arms.
Cut off every arm at once and the eye opens. Take too long and the arms you already cut simply grow back. The first fight has three arms. Every level after that adds another.
An arm that is winding up glows red and will hurt you. An arm that has already struck goes cold and blue for about two seconds — that is the only time it is both harmless and low enough to reach. So bait a slam, get out of the way, and chop the arm on the floor before it pulls back up.
The pips along the bottom of the screen are the arms: filled means alive, and the timer tells you how long until the first severed one returns. Sever the last arm and the body sinks, the eye opens, and you have five seconds to put a dagger in it.
A few of each are hidden in the caverns. The rest come off things you kill, at odds low enough that finding one still feels like luck.
Four hearts, three Bobs. Glowing ink costs a heart and throws you back out, so it is a mistake rather than a death. Bounce shrooms launch you further than a jump. Dying in the arena restarts the fight, not the whole level — but it does cost you the Keen Edge.