This new keyword reads: When an opponent chooses this character for an action, banish them.) Its a big downside, but the characters with it are fairly strong
Mechanics like delirium, delve, and threshold are very good in Sultai decks, so be on the lookout for those
There are also a few more interesting choices: Bonders' EnclaveBonders' Enclave Slayers' StrongholdSlayers' Stronghold Scavenger GroundsScavenger Grounds Spire of IndustrySpire of Industry Upgrading the Limit Break Precon Deck Budget Alternatives Each of these inclusions, at the time of writing, is under $1
Some Cube lists are really creative with their themes
Equip variants or equip abilities with restrictions, like the equip Citizen ability of Ceremonial Groundbreaker from the Streets of New Capenna set, are still equip abilities, and their costs will be reduced by Strong Backs second ability