Jill, Shiva's Dominant // Shiva, Warden of Ice

Every part of this card feeds a single closed loop. Jill arrives as a 2/2 with a nonland bounce, modest tempo by itself; the payoff is the sorcery-speed activation that costs more than the creature carrying it, five mana and a tap to exile her and flip up a three-chapter Saga on the back. That Saga runs its own script (two Mesmerize chapters making a creature unblockable, then Cold Snap taps down every opposing land) before exiling itself and returning her front-face-up, primed to bounce another permanent and re-enter the sequence. The interesting move is structural: each face returns under its owner's control, so the flip is not a downside to endure but a deliberate reset you fire on your own clock. Sagas usually tick passively, one lore counter per turn from the moment they land; grafting one to the back of a legend who can summon it at will converts that automatic chapter sequence into something closer to an activated ability with a built-in timer. The steep flip cost and the sorcery-speed restriction are the counterweights: a repeatable bounce plus an on-command board-wide mana-denial swing would price far too low without them, so the design buries the whole apparatus behind a mana investment you have to earn back each cycle. Cold Snap is both the reward that justifies the wait and the switch that resets the machine for another pass.