Trail of Evidence

Spellslinger payoffs usually force a choice between board impact and card advantage; this one quietly does the accounting for you. The trigger fires on the cast, not the resolution, so a countered spell still leaves you a Clue: the enchantment gets paid the moment you put a spell on the stack, regardless of whether it sticks. That turns a deck full of cantrips and removal into a slow but steady stream of refuels without touching your hand to do it. The design is honest about the exchange: each Clue asks for two mana and a sacrifice before it draws, which means the payoff only lands when your mana is free to spend, so the card rewards patience rather than promising a swing. The clever part is that investigate stacks on top of whatever the spells were already doing, turning a deck's natural churn into a parallel resource any artifact subtheme can loop, copy, or sacrifice for extra value. Among the "reward whenever you cast a spell" enchantments, this one trades raw velocity for token bodies, handing you artifacts other cards can put to work rather than cards straight to hand. The friction is unmistakable: the enchantment does nothing until you start casting around it, and it needs a critical mass of cheap spells to keep the Clues arriving. Given that floor, it suits the grinding blue deck that intended to cast a dozen spells anyway and wanted the excess to compound.