Will, Scion of Peace

Lifegain has always been white and blue's most awkward payoff to build around: the life total is a resource that most games never ask you to spend, so cards that reward gaining it tend to reward nothing at all. This turns the axis sideways. Instead of converting gained life into cards or bodies, it converts the amount you gained this turn into a cost reduction on your own white and blue spells, so every point of incidental lifegain becomes mana efficiency on the same turn. The sorcery-speed clause on the tap ability is the tension it resolves: you cannot bank life across turns and unload it later, and you cannot flash the discount in during someone else's combat, so the reduction only pays off inside a proactive turn you were already going to take. That constraint keeps the ability from spiraling, since the discount lives and dies with the current turn's life-gain tally rather than any running total. The 2/4 body with vigilance does the sequencing work here: because it stays untapped after attacking, you can swing, count up your lifegain in the second main phase, and still tap it for the reduction. Nothing about the ability touches your life total; it reads the number without ever asking you to pay it. What makes the design notable is how it reframes a stat these colors have spent decades treating as a defensive buffer, turning incidental gains into a turn's worth of spells cast for a fraction of their printed cost.