Leader Smoker has a built-in cost-reduction effect, but the list has tons of cost-reducers like Helmeppo, Hina, and Ice Age, to help you set up your KO effects
Run this with Greater Good to force the leaves play, and draw six and discard three for no mana in case someone tries to exile it or bounce/tuck it to stop the death trigger
During each of your turns, you may play a land and cast a spell from among cards in graveyards that were put there from libraries this turn
You can get lost staring at the card art and appreciating just how much is there under the surface
Use rules that prevent 1 player from dominating other players too easily to make the game for fun and challenging
First the active player chooses which creature they'll sacrifice, then each other player in turn order does the same, knowing choices made before their choice