With “with,” you immediately have the key word for the instrumental case. With a discount, with Katya, with respect, by hand: all instrumental case or творительный падеж. You can do much more with this case; it’s truly a beautiful and useful tool.
The joker in a card game, the knight in chess: if you’re looking for something as quirky among the six cases, you’ll quickly land on the fourth. Rules for the
accusative or
винительный падеж are simple, yet (or perhaps because of that) it can easily catch you off guard.
Cases are often seen as the ‘Ghost’ of the Russian language. Like the
white rabbit in
Monty Python and the Holy Grail: ‘Look, that rabbit’s got a vicious streak a mile wide, it’s a killer!’ In this case, it’s a six-headed monster.