Behind the Mask
The clever part is that spending resources makes the card weaker, not stronger, and that inversion is the whole point. Cast it for a single blue and it turns any artifact or creature into a 4/3 until end of turn: a combat trick that can make a mana rock swing or turn an opposing utility creature into a fragile beater. Pay the graveyard cost of collect evidence 6, and the base stats instead collapse to 1/1. This is a removal spell dressed as a pump spell. Shrinking a large attacker or blocker to 1/1 base power and toughness neutralizes it in combat or hands it to any ping effect, while the alternative mode covers the games where you have no graveyard to exile from and just want a temporary body or a surprise blocker. Most pump spells let you scale up as you invest; this one asks you to trade cards out of your graveyard to buy a strictly more destructive outcome, so the decision is not "how big can I go" but "which of these two opposite jobs does the board in front of me need." The base-power-and-toughness wording matters too: it overwrites the target's printed stats rather than adding to them, which is what lets the 1/1 mode function as a size-agnostic answer to something otherwise too large to fight through.
