Cavalier of Night Cavalier of Night provides casual sacrifice decks with a respectable top-end that turns random tokens or sacrifice fodder into a removal spell, plus it offers a reanimation effect later
Kosei, Penitent Warlord Many samurai commanders reward you when you attack alone, which causes problems in a multiplayer format
While other options like Geier Reach Sanitarium and Bonders Enclave are good too, War Room is probably the most universal and easy to activate
Leverage Amethysts strong bounce mechanic to offset your opponent Madam Mim (both Fox and Snake) can be used quite effectively for a plethora of a strategies
Weve been seeing more cards like this recently, and its a design space that Im very interested in
There are very few ways to actually lose energy counters outside of spending them, but it is possible with stray cards like Suncleanser and Final Act