Loyal Unicorn

Lieutenant only pays out while your commander sits on the battlefield, and this is the fog-anchor of that cycle: on your turn, with your general in play, none of your creatures can take combat damage. The distinction that makes it more than a repeatable Fog is that the prevention is one-sided in your favor. Your attackers still connect while shrugging off every blocker, so a symmetrical combat step tilts entirely toward you. Note the timing, though: the trigger reads "on your turn," which means it protects your team as it swings, not when your creatures are called on to block during an opponent's turn. This is an offensive rewrite of combat math, not a defensive lockdown. Layer the vigilance grant on top and the whole board can attack without leaving a hole for the crackback. The cost of the engine is baked into the condition itself: lose the commander and the ability goes dark, so the card is only as reliable as your ability to keep your general on the table. That is the point of Lieutenant as a design, a way to reward the singleton format's central object without resorting to a static keyword-lord effect. The vigilant 3/4 is deliberately plain; the card is a combat-math engine wearing a midsize beater's stat line, and it earns its keep in the go-wide boards where preventing all your incoming damage on the swing turns an even trade into a rout.