Saryth, the Viper's Fang

Both static abilities key off the same axis: tapped versus untapped, the one binary every creature you control toggles through every turn. Untapped, your board is untouchable, immune to targeted removal and any spell or ability that needs to point at a creature. The moment something taps to attack, that shield drops and deathtouch snaps on, turning any blocker into a losing trade and warping the opponent's combat math against your attackers too. Most protection commanders pick a side and pay for it. This one hands you both, and the activated ability is what lets you walk the line at will: spend a mana to untap a creature and you flip it from a deathtouch threat back into a hexproof wall, untap a land for a second use of your mana, or reset a tapped attacker before the opponent's turn so it re-enters their window guarded. That untap toolbox is the quiet engine, restricted to your own creatures and lands: untapping a defender restores the hexproof umbrella, untapping something with a tap ability re-arms it, untapping a mana creature squeezes out an extra green source. The design ties a bodyguard, a combat deterrent, and a ramp outlet to a single state your permanents already cycle through, so you are rarely paying to set up the payoff so much as choosing which half you want. The word "Other" is what keeps it honest: every static skips the 3/4 herself, so the piece making your board unanswerable stays fully answerable on the battlefield.