Beginning with the Yawgmoth arc, a huge, multi-block spanning story that defined much of the games early days, the Phyrexians fell into slumber following his defeat, seemingly vanquished from the multiverse
Legendary Creature Human Assassin3/2 Partner with Evie Frye (When this creature enters, target player may put Evie into their hand from their library, then shuffle.) Whenever one or more Assassins you control deal combat damage to a player, exile up to one target Assassin card or card with freerunning from your graveyard
You might be able to get somewhere by simply playing them and powering them up with Energy cards, but you shouldn't rely on that alone
Cards similar to Kami of the Waning Moon include Gravelgill Duo, Hooded Kavu, Breach
A Prowling Serpopard can't be countered, makes it so other creatures can't be counted, and is a 4/3 for 1GG