Gideon of the Trials

Most planeswalkers ask you to develop a board or grind incremental advantage; this one asks you to keep him on the battlefield and dares the opponent to do something about it before it stops mattering whether they can. The third ability is the heart of the design: an emblem that rewrites the win condition itself, so that while you control any Gideon planeswalker you cannot lose and your opponent cannot win, no matter your life total or the lethal attack coming at you. That clause turns three mana into a stay-of-execution engine, and the rest of the card exists to defend the emblem's premise. The +1 declaws a single threatening permanent for a full turn cycle, including the turn it would otherwise kill you, buying the time the emblem needs. The 0 that makes him a 4/4 indestructible Soldier reads like protection, but loyalty abilities are sorcery-speed and the body only lasts until end of turn: it is an attacker and a way to dodge your own board wipes, not a blocker on the opponent's turn. That gap is the real tension. On the opponent's turn he is just a planeswalker, fully exposed to combat, burn, and ordinary destroy effects; the emblem holds only as long as a Gideon survives to anchor it. He does not close games. He refuses to let you lose them, which is a different job, and one suited to control and prison shells that can keep the clock stopped while a fragile loyalty total holds the line.