The classic is Dark Depths and Thespian's Stage, but theres likely better options these days
It doesnt matter what happens to that Assassin or commander after that
Still, a cube can often be categorized into one or more different types
2 Umbris, Fear Manifest Mill Their Minds Into Dust One of the few dedicated Nightmare commanders in the game, Umbris lets you much on your opponents minds by exiling large chunks of their libraries each time you play it or another Nightmare
On the other hand you have Dismember which is -5/-5 for only 1 more life and again has a life free mode of casting
Basic landcycling ( , Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.) Sorcery Color tag templates(None) Necrotic Hex Each player sacrifices six creatures of their choice