Rivendell

Two questions, one land, and both answers hinge on the same board state: do you control a legendary creature? With one in play, the land untaps ready as a blue source and unlocks a repeatable Scry 2 for a modest activation; with none, it enters tapped and does nothing but tap for mana, a strictly worse Island. That gate is the tax legendary-matters lands pay for their upside, and it means the card is only as strong as the commanders and heroes surrounding it. The Scry 2 is the reward worth chasing: filtration welded onto a mana source, smoothing draws every turn without spending a card or a spell slot. Utility lands that do a second job on top of producing mana have always been valued, but stacking repeatable filtering onto a color source and gating that upside behind a build-around identity is a tighter package than most of that lineage. Crucially, it rewards decks already committed to legendary creatures rather than asking them to warp toward that theme, which is the honest way to price an ability this recurring. Nothing here breaks a curve or ends a game; it quietly improves every draw in exchange for a commitment the deck had already made.