This effect applies no matter how the land would enter: because an opponent plays it, or because a spell or ability allows that opponent to put it onto the battlefield. Note that it doesn't matter under whose control the land enters. If the opponent would put the land onto the battlefield under someone else's control (as a result of Yavimaya Dryad's ability, for example), that opponent will still have to sacrifice a land.
If an opponent puts a land onto the battlefield under their own control, they may sacrifice that same land. The player won't be able to tap that land for mana before sacrificing it.
If a land that would enter has its own "If [this land] would enter" replacement effect, the player who will control that land chooses which replacement effect to apply. After applying one, if the other one would still be applicable, it's then applied.
This printing is one of 3 catalogued treatments from ME3 — the lineup includes Foil and Nonfoil alongside the standard finish. Across our catalog the Rarix library tracks every variant in the same family so collectors can compare price, scarcity and demand inside a single lineage.
Card #40 of *Masters Edition III*, the set that shipped alongside the September 2009 Masters Edition III release.
Card type: Enchantment, color identity blue, printed at rare. Rares occupy the bottom-of-pack rare slot in standard boosters. Mana cost: {2}{U}{U} (4 converted).
Legal in Legacy, Vintage, and Commander. This printing is on Wizards of the Coast's Reserved List — Wizards has committed never to reprint cards on that list, which underwrites a structural scarcity floor on every surviving copy.
EDHrec ranks this card #20,845 in Commander, putting it in the fringe-play tier of the format's playable pool.
Illustrated by Jesper Myrfors. Rarix catalogs 502 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Jesper Myrfors
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
