Rakdos Locket

The two-mode design here is a fixture of the two-color mana rock cycles: fixing early, card advantage late. What separates this one from a plain Signet is the sacrifice mode, which converts the rock into a draw-two once your mana surplus outgrows its ramp function. The payment is deliberately steep, four hybrid pips plus the tap plus the rock itself, so cashing it in is a late-game pivot rather than a repeatable engine. That hybrid cost is the quiet flexibility: any combination of black and red satisfies it, so a two-color deck can crack it off whichever half of its mana it has spare. The trade-off is honest. A Signet fixes two colors for one mana less; this asks a full three and a tap for the same fixing, and you pay that premium precisely because the artifact refuses to become a dead draw in the mid-game. It ramps when you are mana-hungry and it draws when you are mana-flooded, and the mode you use is decided by the board rather than the deckbuilder. That is the whole appeal of the Locket line: a fixing piece with a built-in floor, aimed at grindy two-color decks that would otherwise resent drawing a mana rock on turn ten.