Sigarda's Splendor

The clever part is the anti-lifegain-arms-race clamp built into the draw engine. Rather than rewarding a spiraling life total, it snapshots your life the moment it arrives and only cuts a card the following upkeep if you have held that ground: gained ground counts, but slipping backward stalls the engine and then rebaselines you at the new, lower number. That turns the payoff into a ratchet, not a fountain. You do not need to keep climbing, only to avoid falling, which quietly rewards defensive white shells that stabilize and hold rather than aggressive ones that trade life away. The white-spell lifegain trigger is the pump that keeps the ratchet turning; each white spell nudges you a point above the noted total, so casting on curve is often enough to keep the draws flowing even through incidental chip damage. Where most card-advantage enchantments in white ask for a sacrifice, a tapped creature, or an attack, this one asks only that you not bleed out, which is a demand a controlling deck was going to meet anyway. It is card advantage priced as a reward for doing what the deck already wants: gaining a trickle of life and staying above water.