Even Clives Hideaway could prove rather useful thanks to Commanders love for legendary creatures
Whether this is for a 60-card constructed format like Modern, Pioneer, or Standard, or for testing out the Limited environment in a way that is cost efficient to competitive players
You can sacrifice a Clue tokens whenever you have priority and can pay the activation cost (usually )
While you may think of activated abilities as something that cards on the battlefield use, like lands tapping for mana or planeswalkers using their abilities, theres actually no reason why we cant have abilities that activate from other zones
Since becoming Modern legal in MH2, Cabal Coffers has carved out its own niche in the format
It is, itself, a 2/2, and it can produce a bunch more 2/2s (likely after a sweeper), so it powers your synergies with Dusk // Dawn, Return of the Wildspeaker, and more