Mutational Advantage offers a similar effect, but with some interesting pros and cons
There are a lot of new cards classified as Detectives and the abilities of most of them either target Characters with the Detective keyword or they require one of these cards in play
Giving opponents cards will no doubt give them answers in the end, but in the right build, this could be a tricky piece of a bigger plan
Captain Lannery Storm's last ability triggers whenever you sacrifice a Treasure for any reason, not just to activate a Treasure's mana ability
If an effect allows you to spend mana "as though it were mana" of any color or type, that allows you to spend mana you couldn't otherwise spend, but it doesn't change what mana you spent to cast the spell
Keleth, Sunmane Familiar Keleth, Sunmane Familiar has the Boros condition that requires it to attack, so embrace it and conserve the counters with Reyhan, Last of the Abzan, protect your attacking commander with Ollenbock Escort, and reward the attack with Lae'zel, Vlaakith's Champion