Casal, Lurkwood Pathfinder // Casal, Pathbreaker Owlbear

The front side reads like a green ramp two-for-one: a body with vigilance that fetches a Forest onto the battlefield when it lands. Where it gets strange is the attack trigger, which spends an extra to flip her into a creature that anthems every other legendary creature you control, granting +2/+2 and trample for the turn. That transform clause is the whole design gambit. It reframes the card from a value engine into a payoff for a board of legends, which is a build restriction the front side does nothing to hint at. The owlbear side then transforms back on your next upkeep, so the anthem is a recurring alpha-strike button rather than a permanent buff: pay the mana on the attack, swing with a boosted legendary team, flip back, repeat. The timing is deliberate. You only get the pump when Casal herself is attacking, and only if you have the mana open, which keeps the effect tethered to committing to combat rather than sitting back. The Tiefling Druid framing places her in the same fantasy-crossover translation lineage as the rest of the Universes Within reprints, redrawn into Magic's own idiom. What lingers is how neatly the two halves argue with each other: one side wants to develop your mana and sit behind vigilance, the other wants a wide legendary board it can point at your opponent's life total.