Arena Rector

The trick this card pulls is converting a death trigger into a tutor that puts a planeswalker directly onto the battlefield, skipping the mana cost entirely. That clause matters more than the modest 1/2 body suggests, because cheating a six- or seven-mana planeswalker into play for the price of a four-mana creature and a sacrifice is a rate no honest cast can match. The exile-on-death wording is the wrinkle worth reading carefully: the trigger only fires if the creature actually dies, so a player can lean on their own sacrifice outlets rather than waiting for the opponent's removal, turning an otherwise passive body into a deliberate launch mechanism. The search-then-shuffle ending means there is no card-selection downside; you find exactly the walker the board calls for. White had long handled reanimation and recursion (Reveillark, Sun Titan, Karmic Guide), but it rarely got to break the planeswalker mana curve so openly, which is why this design lands in white at all rather than the colors more associated with cheating big spells into play. It rewards a deck stocked with high-impact walkers and the means to kill its own Cleric on a chosen turn, collapsing a multi-turn ramp plan into a single sacrifice.