Sphere of Truth

One color, one direction, two points stopped each time: this is the Circle of Protection idea reworked into a passive shield against white. Where a Circle of Protection demanded a mana payment for each instance of damage it turned away, this asks nothing once it resolves; the prevention just happens, every time a white source swings or burns at your face. The cost of that convenience is paid up front in scope. It protects only you, not your creatures. It shaves two off each hit rather than absorbing the whole thing. And it answers exactly one color, which makes its value a step function: against a plan built on small repeated white sources, knocking two off every instance compounds quickly, while against a single large threat or a deck where white is just a splash it does almost nothing. That sharpness is the entire bargain. Stripping the Circle's repeatable, mana-gated prevention down to a flat fixed number trades flexibility for a fire-and-forget enchantment that never taxes you again. It belongs to a cycle of five, one keyed to each color, every member performing the same fixed two-point prevention against its corresponding source. White's is the version whose fixed number lines up most cleanly with how its color tends to deal damage: not in one decisive burst but in accumulated chip, exactly the pattern a constant two-point haircut erodes best.