I find Rapacious Guest weirdly intriguing
An example would be raskas Contempt At the end of its season, ending both Ixalan and Rivals of Ixalan, Contempt was pretty cheap
Hard sell on a 6-mana commander, but you can build-your-own-ETB if you have some spare mana and a few cheap spells in the yard
Timothar, Baron Of Bats Feed The Swarm A card that appears within one of the Crimson Vow Commander Decks, Timothar, Baron of Bats evokes the iconic transformation from a Vampire into a bat
Stick it on any artifact while you have eight Clues on board and just wait a turn for an instant win
Used as a blunt instrument it can be Nevinyrral's Disk and wipe out the whole board, and if you can show your hand via a small investment you can do it at any time with confidence that nothing on board is likely to be too expensive to take out