Conspiracy Unraveler

Collect evidence usually reads as a modest rebate: exile a few cards, shave a spell's cost down by a mana or two. Pushed to ten, it stops being a discount and becomes a currency. Ten mana value of exiled cards buys any spell you cast, at any printed cost, for nothing, which reframes the graveyard from a resource you draw on to a wallet you spend from. The catch is that the exile is permanent and stacks: each free spell burns ten mana value out of your yard for good, so the engine wants a deck that fills the graveyard faster than it empties one, and it competes with every other graveyard payoff you might have preferred to keep. Where the many "cast spells for free" designs of the past hedged with restrictions (noncreatures only, artifacts only, cast from a fixed zone), this alternative cost applies to spells generally, with no restriction on type or origin. The 6/6 flier underneath is what keeps the card honest. That body wins games at a fair rate on its own, so the free-spell mode is upside layered onto a finisher rather than a fragile engine you have to assemble before the card does anything. That layering is the design: a creature that closes games fairly, with a graveyard-payment button bolted on for the decks equipped to press it.