Sword of Truth and Justice

The wrinkle in the Swords cycle is that each pair of protections isn't just defensive keyword coverage; it's a targeted metagame call about which colors' interaction the equipped creature walks through once it has resolved and connected. Protection from white and from blue names the two colors most likely to hold a clean answer: white's exile removal and combat, blue's bounce and blockers, all of which glance off the equipped creature on the battlefield. (The protection lives on the equipped creature, so it does nothing for the equipment spell or the creature itself on the stack; a counterspell aimed at either still resolves.) That distinction made this the Sword the fair blue-white decks least wanted to see once a threat was already down. Where most of the cycle grants a self-contained combat reward (a card, a token, life and a burn), this one places a counter on a creature you control and then proliferates, which turns a flat payoff into an escalating one: every connection can extend a growing threat while adding loyalty to planeswalkers, ammunition to charge-counter engines, or another point to any counters you choose to advance. The proliferate is yours to aim, so a deck already invested in counters gets a board-wide bump from a single unblocked hit rather than a fixed bonus. The tempo cost is what keeps it fair: the counter and proliferate resolve after damage, so the payoff always lags behind the swing that earned it.