Para todos os que tinham dúvidas sobre a sua última habilidade (como eu já cheguei a ter), está aqui as rulings que ela tem, de acordo com o Gatherer de Magic:

10/1/2008 - Once Elspeth's third ability resolves, it's continually in effect until the game ends, even if Elspeth has already left the battlefield or leaves the battlefield at some point afterwards. It doesn't lock in what it applies to. Since the effect states a true thing about a set of permanents, but doesn't actually change the *characteristics* of those permanents, it will apply to whatever artifacts, creatures, enchantments, and lands you happen to control at any point in the game from that time forward. It will apply to such permanents that come under your control after the ability has resolved, and it will cease to apply to permanents that leave your control. Since the ability doesn't change those permanents' characteristics, if any of them loses all abilities, it will still be indestructible.

10/1/2008 - Lethal damage and effects that say "destroy" won't cause an indestructible permanent to be put into the graveyard. However, an indestructible permanent can be put into the graveyard for a number of reasons. The most likely reasons are if it's sacrificed, if it's legendary and another legendary permanent with the same name is on the battlefield, if it's a creature whose toughness is 0 or less, or if it's an Aura that's either unattached or attached to something illegal.

Tradução simples: Todas as permanentes do jogador que tem a Elspeth(excepto Planeswalkers) que estejam em jogo no momento da activação ou que entrem em jogo depois são Indestructíveis até que saiam de jogo.

Se tiverem dúvidas: gatherer.wizards.com/Pages/Card/Details....?multiverseid=174859