Valakut + Scapeshift

Valakut, the Molten Pinnacle
Land
Valakut, the Molten Pinnacle enters the battlefield tapped.
Whenever a Mountain enters the battlefield under your control, if you control at least five other Mountains, you may have Valakut, the Molten Pinnacle deal 3 damage to target creature or player.
{T}: Add {R} to your mana pool.

Scapeshift
Sorcery
Sacrifice any number of lands. Search your library for that many land cards, put them onto the battlefield tapped, then shuffle your library.

603.6a Enters-the-battlefield abilities trigger when a permanent enters the battlefield. These are written, “When [this object] enters the battlefield, . . . “ or “Whenever a [type] enters the battlefield, . . .” Each time an event puts one or more permanents onto the battlefield, all permanents on the battlefield (including the newcomers) are checked for any enters-the-battlefield triggers that match the event.

Le 21/09/2009, Shinichi avait écrit ...

Donc en fait valakut voit en meme temps la condition de déclanchement (5 montagnes) et trigger ces memes montagnes qui ont permis de la valider... Bizarre...