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Where I am more certain is with Blood Baron of Vizkopa and Vona, Butcher of Magan, which both get near-unbeatable in the right scenario

Putting a +1/+1 counter on a creature with unleash that's already blocking won't remove it from combat

Good targets to fetch with this could be Darksteel Forge or Mycosynth Lattice in an artifact deck, or large artifact creatures like Blightsteel Colossus

You can encode a ciphered spell onto any creature, including tokens or copies of other creatures

It used an alternate format that took heavy inspiration from the board game Clue (also called Cluedo)

Outside of Sapphires tendency to ramp ink or mana quickly, or the ability to filter through a deck, there are a handful of similar bonuses from just having Detective cards in your deck